fix(gtk): PathChooser Enter key now confirms dialog and prevents hang

Pressing Enter in a PathChooser widget previously caused a hang when
inside dialogs (due to unhandled keypress propagation) and did not
confirm the dialog. Both issues are now fixed: Enter is intercepted
at the PathChooser level to stop propagation, and the containing
dialog is triggered to respond correctly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: flound1129

deluge/ui/gtk3/path_combo_chooser.py

@@ -1409,8 +1409,12 @@ def _on_entry_text_key_press_event(self, widget, event):
             if self.auto_completer.auto_complete_enabled:
                 self.auto_completer.do_completion()
                 return True
-        # Show popup when Enter is pressed
+        # Show popup when Enter is pressed, unless inside a dialog where
+        # Enter should confirm the dialog instead of opening the popup.
         elif key_is_enter(keyval):
+            if isinstance(self.get_toplevel(), Gtk.Dialog):
+                self.get_toplevel().activate_default()
+                return True
             # This sets the toggle active which results in
             # on_button_toggle_dropdown_toggled being called which initiates the popup
             self.button_toggle.set_active(True)