Set selected instance to None when switching frames or videos

sleap/gui/commands.py

@@ -363,10 +363,12 @@ def exportFullPackage(self):
     def previousLabeledFrame(self):
         """Goes to labeled frame prior to current frame."""
         self.execute(GoPreviousLabeledFrame)
+        self.state["instance"] = None
 
     def nextLabeledFrame(self):
         """Goes to labeled frame after current frame."""
         self.execute(GoNextLabeledFrame)
+        self.state["instance"] = None
 
     def nextUserLabeledFrame(self):
         """Goes to next labeled frame with user instances."""
@@ -403,6 +405,7 @@ def nextTrackFrame(self):
     def gotoFrame(self):
         """Shows gui to go to frame by number."""
         self.execute(GoFrameGui)
+        self.state["instance"] = None
 
     def selectToFrame(self):
         """Shows gui to go to frame by number."""
@@ -411,14 +414,17 @@ def selectToFrame(self):
     def gotoVideoAndFrame(self, video: Video, frame_idx: int):
         """Activates video and goes to frame."""
         NavCommand.go_to(self, frame_idx, video)
+        self.state["instance"] = None
 
     def nextView(self):
         """Goes to next view."""
         self.execute(GoAdjacentView, prev_or_next="next")
+        self.state["instance"] = None
 
     def prevView(self):
         """Goes to previous view."""
         self.execute(GoAdjacentView, prev_or_next="prev")
+        self.state["instance"] = None
 
     # Editing Commands