[gnome-shell] panel: Don't chain up to non-existent parent vfunc

[Florian Müllner <fmuellner src gnome org>]

commit c1ae634174db37d00a0715fde69aa92dad3b9ff0
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Mon Nov 4 11:18:25 2019 +0100

    panel: Don't chain up to non-existent parent vfunc
    
    Just as with c35b4cede58142797b1f6b04a4e2e7eaa938234a, there's no
    default vfunc implemented by any parent which causes gjs to crash when
    trying to call it.
    
    So return EVENT_STOP if the key press successfully toggled the button,
    and EVENT_PROPAGATE otherwise.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/830

 js/ui/panel.js | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/js/ui/panel.js b/js/ui/panel.js
index 69882894cd..e8e45b0abb 100644
--- a/js/ui/panel.js
+++ b/js/ui/panel.js
@@ -480,15 +480,15 @@ class ActivitiesButton extends PanelMenu.Button {
     }
 
     vfunc_key_release_event(keyEvent) {
-        let ret = super.vfunc_key_release_event(keyEvent);
-        if (ret == Clutter.EVENT_PROPAGATE) {
-            let symbol = keyEvent.keyval;
-            if (symbol == Clutter.KEY_Return || symbol == Clutter.KEY_space) {
-                if (Main.overview.shouldToggleByCornerOrButton())
-                    Main.overview.toggle();
+        let symbol = keyEvent.keyval;
+        if (symbol == Clutter.KEY_Return || symbol == Clutter.KEY_space) {
+            if (Main.overview.shouldToggleByCornerOrButton()) {
+                Main.overview.toggle();
+                return Clutter.EVENT_STOP;
             }
         }
-        return ret;
+
+        return Clutter.EVENT_PROPAGATE;
     }
 
     _xdndToggleOverview() {