widget: reset all controllers when the widget becomes insensitive

Widgets becoming insensitive won't receive further events, but there
could be chances the controllers don't get properly notified and reset
in those situations.

gtk/gtkwidget.c

@@ -12681,6 +12681,19 @@ gtk_widget_propagate_state (GtkWidget    *widget,
           g_list_free (devices);
         }
 
+      if (!gtk_widget_is_sensitive (widget))
+        {
+          EventControllerData *data;
+          GList *l;
+
+          /* Reset all controllers */
+          for (l = priv->event_controllers; l; l = l->next)
+            {
+              data = l->data;
+              gtk_event_controller_reset (data->controller);
+            }
+        }
+
       if (GTK_IS_CONTAINER (widget))
         {
           GtkStateData child_data;