diff --git a/po/es.po b/po/es.po
index 60fa34d..fa736ab 100644
--- a/po/es.po
+++ b/po/es.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: io.github.leolost2605.gradebook\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-12-24 10:32+0100\n"
+"POT-Creation-Date: 2023-12-24 12:50+0100\n"
 "PO-Revision-Date: 2023-12-24 10:40+0100\n"
 "Last-Translator: Óscar Fernández Díaz <oscfdezdz@tuta.io>\n"
 "Language-Team: Spanish\n"
@@ -18,15 +18,14 @@ msgstr ""
 "Plural-Forms: nplurals=2; plural=(n != 1)\n"
 "X-Generator: Gtranslator 45.3\n"
 
-#: src/add-category-dialog.vala:7 src/edit-subject-dialog.vala:46
-#: src/new-subject-dialog.vala:104
+#: src/add-category-dialog.vala:7 src/edit-subject-dialog.vala:72
 msgid "Add New Category"
 msgstr "Añadir categoría nueva"
 
 #. BUTTONS
-#: src/add-category-dialog.vala:12 src/edit-subject-dialog.vala:22
-#: src/edit-subject-dialog.vala:101 src/new-grade-dialog.vala:14
-#: src/new-subject-dialog.vala:27 src/subject-page.vala:240
+#: src/add-category-dialog.vala:12 src/edit-subject-dialog.vala:26
+#: src/edit-subject-dialog.vala:141 src/new-grade-dialog.vala:14
+#: src/subject-page.vala:240
 msgid "Cancel"
 msgstr "Cancelar"
 
@@ -42,42 +41,50 @@ msgstr "Nombre de la categoría"
 msgid "Category Percent"
 msgstr "Porcentaje de la categoría"
 
-#: src/application.vala:42
+#: src/application.vala:34
 msgid "translator-credits"
 msgstr "Óscar Fernández Díaz <oscfdezdz@tuta.io>"
 
-#: src/application.vala:43 src/window.vala:12
+#: src/application.vala:35 src/window.vala:12
 msgid "Gradebook"
 msgstr "Libro de calificaciones"
 
-#: src/edit-subject-dialog.vala:10
+#: src/edit-subject-dialog.vala:12
+msgid "New Subject"
+msgstr "Materia nueva"
+
+#: src/edit-subject-dialog.vala:12
 msgid "Edit Subject"
 msgstr "Editar materia"
 
-#: src/edit-subject-dialog.vala:27 src/new-subject-dialog.vala:33
+#: src/edit-subject-dialog.vala:31
 msgid "Save"
 msgstr "Guardar"
 
-#: src/edit-subject-dialog.vala:55 src/new-subject-dialog.vala:99
+#: src/edit-subject-dialog.vala:60
+msgid "Subject Title"
+msgstr "Título de la materia"
+
+#: src/edit-subject-dialog.vala:82
 msgid "Subject Categories"
 msgstr "Categorías de la materia"
 
-#: src/edit-subject-dialog.vala:59
+#: src/edit-subject-dialog.vala:86
 msgid "Delete Subject…"
 msgstr "Eliminar materia…"
 
 #. /TRANSLATORS: %s is the name of a school subject
-#: src/edit-subject-dialog.vala:99
+#: src/edit-subject-dialog.vala:139
 #, c-format
 msgid "Delete %s?"
 msgstr "¿Eliminar %s?"
 
-#: src/edit-subject-dialog.vala:100
+#: src/edit-subject-dialog.vala:140
 #, c-format
 msgid "If you delete %s, its information will be deleted permanently."
 msgstr "Si elimina %s, su información se borrará permanentemente."
 
-#: src/edit-subject-dialog.vala:102 src/subject-page.vala:241
+#: src/edit-subject-dialog.vala:142 src/subject-page.vala:241
 msgid "Delete"
 msgstr "Eliminar"
 
@@ -97,14 +104,6 @@ msgstr "Categoría"
 msgid "Note"
 msgstr "Nota"
 
-#: src/new-subject-dialog.vala:11
-msgid "New Subject"
-msgstr "Materia nueva"
-
-#: src/new-subject-dialog.vala:66
-msgid "Subject Title"
-msgstr "Título de la materia"
-
 #: src/subject-page.vala:36
 msgid "_Help"
 msgstr "A_yuda"
diff --git a/po/io.github.leolost2605.gradebook.pot b/po/io.github.leolost2605.gradebook.pot
index ffb232b..28662c1 100644
--- a/po/io.github.leolost2605.gradebook.pot
+++ b/po/io.github.leolost2605.gradebook.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: io.github.leolost2605.gradebook\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-12-23 16:14+0100\n"
+"POT-Creation-Date: 2023-12-24 12:50+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -17,15 +17,14 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: src/add-category-dialog.vala:7 src/edit-subject-dialog.vala:46
-#: src/new-subject-dialog.vala:104
+#: src/add-category-dialog.vala:7 src/edit-subject-dialog.vala:72
 msgid "Add New Category"
 msgstr ""
 
 #. BUTTONS
-#: src/add-category-dialog.vala:12 src/edit-subject-dialog.vala:22
-#: src/edit-subject-dialog.vala:101 src/new-grade-dialog.vala:14
-#: src/new-subject-dialog.vala:27 src/subject-page.vala:240
+#: src/add-category-dialog.vala:12 src/edit-subject-dialog.vala:26
+#: src/edit-subject-dialog.vala:141 src/new-grade-dialog.vala:14
+#: src/subject-page.vala:240
 msgid "Cancel"
 msgstr ""
 
@@ -41,42 +40,50 @@ msgstr ""
 msgid "Category Percent"
 msgstr ""
 
-#: src/application.vala:47
+#: src/application.vala:34
 msgid "translator-credits"
 msgstr ""
 
-#: src/application.vala:48 src/window.vala:12
+#: src/application.vala:35 src/window.vala:12
 msgid "Gradebook"
 msgstr ""
 
-#: src/edit-subject-dialog.vala:10
+#: src/edit-subject-dialog.vala:12
+msgid "New Subject"
+msgstr ""
+
+#: src/edit-subject-dialog.vala:12
 msgid "Edit Subject"
 msgstr ""
 
-#: src/edit-subject-dialog.vala:27 src/new-subject-dialog.vala:33
+#: src/edit-subject-dialog.vala:31
 msgid "Save"
 msgstr ""
 
-#: src/edit-subject-dialog.vala:55 src/new-subject-dialog.vala:99
+#: src/edit-subject-dialog.vala:60
+msgid "Subject Title"
+msgstr ""
+
+#: src/edit-subject-dialog.vala:82
 msgid "Subject Categories"
 msgstr ""
 
-#: src/edit-subject-dialog.vala:59
+#: src/edit-subject-dialog.vala:86
 msgid "Delete Subject…"
 msgstr ""
 
 #. /TRANSLATORS: %s is the name of a school subject
-#: src/edit-subject-dialog.vala:99
+#: src/edit-subject-dialog.vala:139
 #, c-format
 msgid "Delete %s?"
 msgstr ""
 
-#: src/edit-subject-dialog.vala:100
+#: src/edit-subject-dialog.vala:140
 #, c-format
 msgid "If you delete %s, its information will be deleted permanently."
 msgstr ""
 
-#: src/edit-subject-dialog.vala:102 src/subject-page.vala:241
+#: src/edit-subject-dialog.vala:142 src/subject-page.vala:241
 msgid "Delete"
 msgstr ""
 
@@ -96,14 +103,6 @@ msgstr ""
 msgid "Note"
 msgstr ""
 
-#: src/new-subject-dialog.vala:11
-msgid "New Subject"
-msgstr ""
-
-#: src/new-subject-dialog.vala:66
-msgid "Subject Title"
-msgstr ""
-
 #: src/subject-page.vala:36
 msgid "_Help"
 msgstr ""
diff --git a/po/it.po b/po/it.po
index ef22b8f..dc22140 100644
--- a/po/it.po
+++ b/po/it.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: io.github.leolost2605.gradebook\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-12-23 16:14+0100\n"
+"POT-Creation-Date: 2023-12-24 12:50+0100\n"
 "PO-Revision-Date: 2023-12-09 19:53+0100\n"
 "Last-Translator: Albano Battistella <albanobattistella@gmail.com>\n"
 "Language-Team: Italian <LL@li.org>\n"
@@ -16,15 +16,14 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: src/add-category-dialog.vala:7 src/edit-subject-dialog.vala:46
-#: src/new-subject-dialog.vala:104
+#: src/add-category-dialog.vala:7 src/edit-subject-dialog.vala:72
 msgid "Add New Category"
 msgstr "Aggiungi nuova categoria"
 
 #. BUTTONS
-#: src/add-category-dialog.vala:12 src/edit-subject-dialog.vala:22
-#: src/edit-subject-dialog.vala:101 src/new-grade-dialog.vala:14
-#: src/new-subject-dialog.vala:27 src/subject-page.vala:240
+#: src/add-category-dialog.vala:12 src/edit-subject-dialog.vala:26
+#: src/edit-subject-dialog.vala:141 src/new-grade-dialog.vala:14
+#: src/subject-page.vala:240
 msgid "Cancel"
 msgstr "Cancella"
 
@@ -40,42 +39,50 @@ msgstr "Nome Categoria"
 msgid "Category Percent"
 msgstr "Percentuale categoria"
 
-#: src/application.vala:47
+#: src/application.vala:34
 msgid "translator-credits"
 msgstr "Albano Battistella"
 
-#: src/application.vala:48 src/window.vala:12
+#: src/application.vala:35 src/window.vala:12
 msgid "Gradebook"
 msgstr "Registro dei voti"
 
-#: src/edit-subject-dialog.vala:10
+#: src/edit-subject-dialog.vala:12
+msgid "New Subject"
+msgstr "Nuovo soggetto"
+
+#: src/edit-subject-dialog.vala:12
 msgid "Edit Subject"
 msgstr "Modifica soggetto"
 
-#: src/edit-subject-dialog.vala:27 src/new-subject-dialog.vala:33
+#: src/edit-subject-dialog.vala:31
 msgid "Save"
 msgstr "Salva"
 
-#: src/edit-subject-dialog.vala:55 src/new-subject-dialog.vala:99
+#: src/edit-subject-dialog.vala:60
+msgid "Subject Title"
+msgstr "Titolo argomento"
+
+#: src/edit-subject-dialog.vala:82
 msgid "Subject Categories"
 msgstr "Categorie di questo argomento:"
 
-#: src/edit-subject-dialog.vala:59
+#: src/edit-subject-dialog.vala:86
 msgid "Delete Subject…"
 msgstr "Cancella argomento…"
 
 #. /TRANSLATORS: %s is the name of a school subject
-#: src/edit-subject-dialog.vala:99
+#: src/edit-subject-dialog.vala:139
 #, c-format
 msgid "Delete %s?"
 msgstr "Eliminare %s?"
 
-#: src/edit-subject-dialog.vala:100
+#: src/edit-subject-dialog.vala:140
 #, c-format
 msgid "If you delete %s, its information will be deleted permanently."
 msgstr "Se elimini %s, le sue informazioni verranno eliminate permanentemente."
 
-#: src/edit-subject-dialog.vala:102 src/subject-page.vala:241
+#: src/edit-subject-dialog.vala:142 src/subject-page.vala:241
 msgid "Delete"
 msgstr "Cancella"
 
@@ -95,14 +102,6 @@ msgstr "Categoria"
 msgid "Note"
 msgstr "Nota"
 
-#: src/new-subject-dialog.vala:11
-msgid "New Subject"
-msgstr "Nuovo soggetto"
-
-#: src/new-subject-dialog.vala:66
-msgid "Subject Title"
-msgstr "Titolo argomento"
-
 #: src/subject-page.vala:36
 msgid "_Help"
 msgstr "_Aiuto"
diff --git a/po/nl.po b/po/nl.po
index e8e537a..bca83f1 100644
--- a/po/nl.po
+++ b/po/nl.po
@@ -6,7 +6,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: io.github.leolost2605.gradebook\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-12-23 16:14+0100\n"
+"POT-Creation-Date: 2023-12-24 12:50+0100\n"
 "PO-Revision-Date: 2022-12-22 16:48+0100\n"
 "Last-Translator: Heimen Stoffels <vistausss@fastmail.com>\n"
 "Language-Team: Dutch\n"
@@ -17,16 +17,15 @@ msgstr ""
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
 "X-Generator: Lokalize 22.12.0\n"
 
-#: src/add-category-dialog.vala:7 src/edit-subject-dialog.vala:46
-#: src/new-subject-dialog.vala:104
+#: src/add-category-dialog.vala:7 src/edit-subject-dialog.vala:72
 #, fuzzy
 msgid "Add New Category"
 msgstr "Categorie toevoegen"
 
 #. BUTTONS
-#: src/add-category-dialog.vala:12 src/edit-subject-dialog.vala:22
-#: src/edit-subject-dialog.vala:101 src/new-grade-dialog.vala:14
-#: src/new-subject-dialog.vala:27 src/subject-page.vala:240
+#: src/add-category-dialog.vala:12 src/edit-subject-dialog.vala:26
+#: src/edit-subject-dialog.vala:141 src/new-grade-dialog.vala:14
+#: src/subject-page.vala:240
 msgid "Cancel"
 msgstr "Annuleren"
 
@@ -44,45 +43,53 @@ msgstr "Categorie:"
 msgid "Category Percent"
 msgstr "Categorie:"
 
-#: src/application.vala:47
+#: src/application.vala:34
 msgid "translator-credits"
 msgstr ""
 
-#: src/application.vala:48 src/window.vala:12
+#: src/application.vala:35 src/window.vala:12
 #, fuzzy
 msgid "Gradebook"
 msgstr "Over Gradebook"
 
-#: src/edit-subject-dialog.vala:10
+#: src/edit-subject-dialog.vala:12
+msgid "New Subject"
+msgstr "Nieuw vak"
+
+#: src/edit-subject-dialog.vala:12
 msgid "Edit Subject"
 msgstr "Vak bewerken"
 
-#: src/edit-subject-dialog.vala:27 src/new-subject-dialog.vala:33
+#: src/edit-subject-dialog.vala:31
 msgid "Save"
 msgstr ""
 
-#: src/edit-subject-dialog.vala:55 src/new-subject-dialog.vala:99
+#: src/edit-subject-dialog.vala:60
+msgid "Subject Title"
+msgstr ""
+
+#: src/edit-subject-dialog.vala:82
 #, fuzzy
 msgid "Subject Categories"
 msgstr "Categorieën van vak:"
 
-#: src/edit-subject-dialog.vala:59
+#: src/edit-subject-dialog.vala:86
 #, fuzzy
 msgid "Delete Subject…"
 msgstr "Vak verwijderen"
 
 #. /TRANSLATORS: %s is the name of a school subject
-#: src/edit-subject-dialog.vala:99
+#: src/edit-subject-dialog.vala:139
 #, fuzzy, c-format
 msgid "Delete %s?"
 msgstr "Verwijderen"
 
-#: src/edit-subject-dialog.vala:100
+#: src/edit-subject-dialog.vala:140
 #, c-format
 msgid "If you delete %s, its information will be deleted permanently."
 msgstr ""
 
-#: src/edit-subject-dialog.vala:102 src/subject-page.vala:241
+#: src/edit-subject-dialog.vala:142 src/subject-page.vala:241
 msgid "Delete"
 msgstr "Verwijderen"
 
@@ -105,14 +112,6 @@ msgstr "Categorie:"
 msgid "Note"
 msgstr ""
 
-#: src/new-subject-dialog.vala:11
-msgid "New Subject"
-msgstr "Nieuw vak"
-
-#: src/new-subject-dialog.vala:66
-msgid "Subject Title"
-msgstr ""
-
 #: src/subject-page.vala:36
 #, fuzzy
 msgid "_Help"
diff --git a/po/ru.po b/po/ru.po
index deeaf50..2b43f90 100644
--- a/po/ru.po
+++ b/po/ru.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: io.github.leolost2605.gradebook\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-12-23 16:14+0100\n"
+"POT-Creation-Date: 2023-12-24 12:50+0100\n"
 "PO-Revision-Date: 2022-12-28 10:28+0800\n"
 "Last-Translator: \n"
 "Language-Team: \n"
@@ -21,16 +21,15 @@ msgstr ""
 "X-Poedit-Basepath: ../src\n"
 "X-Poedit-SearchPath-0: .\n"
 
-#: src/add-category-dialog.vala:7 src/edit-subject-dialog.vala:46
-#: src/new-subject-dialog.vala:104
+#: src/add-category-dialog.vala:7 src/edit-subject-dialog.vala:72
 #, fuzzy
 msgid "Add New Category"
 msgstr "Добавить новую категорию"
 
 #. BUTTONS
-#: src/add-category-dialog.vala:12 src/edit-subject-dialog.vala:22
-#: src/edit-subject-dialog.vala:101 src/new-grade-dialog.vala:14
-#: src/new-subject-dialog.vala:27 src/subject-page.vala:240
+#: src/add-category-dialog.vala:12 src/edit-subject-dialog.vala:26
+#: src/edit-subject-dialog.vala:141 src/new-grade-dialog.vala:14
+#: src/subject-page.vala:240
 msgid "Cancel"
 msgstr "Отмена"
 
@@ -48,45 +47,53 @@ msgstr "Категория:"
 msgid "Category Percent"
 msgstr "Категория:"
 
-#: src/application.vala:47
+#: src/application.vala:34
 msgid "translator-credits"
 msgstr "Alex Kryuchkov"
 
-#: src/application.vala:48 src/window.vala:12
+#: src/application.vala:35 src/window.vala:12
 #, fuzzy
 msgid "Gradebook"
 msgstr "О Gradebook"
 
-#: src/edit-subject-dialog.vala:10
+#: src/edit-subject-dialog.vala:12
+msgid "New Subject"
+msgstr "Новый предмет"
+
+#: src/edit-subject-dialog.vala:12
 msgid "Edit Subject"
 msgstr "Редактировать предмет"
 
-#: src/edit-subject-dialog.vala:27 src/new-subject-dialog.vala:33
+#: src/edit-subject-dialog.vala:31
 msgid "Save"
 msgstr ""
 
-#: src/edit-subject-dialog.vala:55 src/new-subject-dialog.vala:99
+#: src/edit-subject-dialog.vala:60
+msgid "Subject Title"
+msgstr ""
+
+#: src/edit-subject-dialog.vala:82
 #, fuzzy
 msgid "Subject Categories"
 msgstr "Категории этого предмета:"
 
-#: src/edit-subject-dialog.vala:59
+#: src/edit-subject-dialog.vala:86
 #, fuzzy
 msgid "Delete Subject…"
 msgstr "Удалить предмет"
 
 #. /TRANSLATORS: %s is the name of a school subject
-#: src/edit-subject-dialog.vala:99
+#: src/edit-subject-dialog.vala:139
 #, fuzzy, c-format
 msgid "Delete %s?"
 msgstr "Удалить"
 
-#: src/edit-subject-dialog.vala:100
+#: src/edit-subject-dialog.vala:140
 #, c-format
 msgid "If you delete %s, its information will be deleted permanently."
 msgstr ""
 
-#: src/edit-subject-dialog.vala:102 src/subject-page.vala:241
+#: src/edit-subject-dialog.vala:142 src/subject-page.vala:241
 msgid "Delete"
 msgstr "Удалить"
 
@@ -109,14 +116,6 @@ msgstr "Категория:"
 msgid "Note"
 msgstr ""
 
-#: src/new-subject-dialog.vala:11
-msgid "New Subject"
-msgstr "Новый предмет"
-
-#: src/new-subject-dialog.vala:66
-msgid "Subject Title"
-msgstr ""
-
 #: src/subject-page.vala:36
 #, fuzzy
 msgid "_Help"