oh-cell: Fix safe-area issues (#2853)

Fixes #2844.

Signed-off-by: Florian Hotze <dev@florianhotze.com>

bundles/org.openhab.ui/web/src/css/app.styl

@@ -320,3 +320,10 @@ html
       padding-left var(--f7-list-item-padding-horizontal)
       .item-inner
         padding-right var(--f7-list-item-padding-horizontal)
+
+// Fix safe area issues with oh-cell components, where safe areas are already respected by the wrapping oh-block
+.oh-cell
+  margin-top var(--f7-card-expandable-margin-vertical)
+  margin-bottom var(--f7-card-expandable-margin-vertical)
+  margin-left var(--f7-card-expandable-margin-horizontal)
+  margin-right var(--f7-card-expandable-margin-horizontal)