fix(gtk): prevent PathChooser Enter key hang inside dialogs

When Enter is pressed in a PathChooser text entry, it opens the
stored-values popup which does a seat.grab(). Inside a modal dialog,
the nested grab deadlocks GTK's event loop, requiring a force quit.

Fix: when the widget's toplevel is a Gtk.Dialog, skip the popup and
call activate_default() to confirm the dialog. This is needed because
entry_text lacks activates-default, so simply propagating Enter does
not reach the dialog's default button.

Affects all five PathChooser uses in dialogs (move storage, add
torrent ×2, preferences ×3). The standalone use in OptionsTab
(parented to the main window) is unaffected.

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

Author: flound1129

deluge/ui/gtk3/path_combo_chooser.py

@@ -1438,8 +1438,12 @@ 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)