[gtk/fix-event-forwarding] Trigger bindings when forwarding key events

[Matthias Clasen <matthiasc src gnome org>]

commit da7cd6ae2531f11f562198786d564bad228a98b3
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Mar 31 14:04:35 2019 -0400

    Trigger bindings when forwarding key events
    
    This broke backspace handling in entries when an entry
    completion is present.
    
    Closes: https://gitlab.gnome.org/GNOME/gtk/issues/1793

 gtk/gtkeventcontrollerkey.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gtk/gtkeventcontrollerkey.c b/gtk/gtkeventcontrollerkey.c
index f7f3fe1017..6ca7020ef7 100644
--- a/gtk/gtkeventcontrollerkey.c
+++ b/gtk/gtkeventcontrollerkey.c
@@ -502,6 +502,9 @@ gtk_event_controller_key_forward (GtkEventControllerKey *controller,
                                  GTK_PHASE_BUBBLE))
     return TRUE;
 
+  if (gtk_bindings_activate_event (G_OBJECT (widget), (GdkEventKey *)controller->current_event))
+    return TRUE;
+
   return FALSE;
 }