[gtk] popovermenu: Only close if there's a new focus widget

[Timm Bäder <baedert src gnome org>]

commit fb1145d72d241c2054a8ff4664f1ceedc317dfc0
Author: Timm Bäder <mail baedert org>
Date:   Sun Oct 6 12:50:22 2019 +0200

    popovermenu: Only close if there's a new focus widget
    
    Makes sense and otherwise we end up closing the popover for no reason

 gtk/gtkpopovermenu.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkpopovermenu.c b/gtk/gtkpopovermenu.c
index fdc053e6e4..5249941a78 100644
--- a/gtk/gtkpopovermenu.c
+++ b/gtk/gtkpopovermenu.c
@@ -215,7 +215,10 @@ focus_out (GtkEventControllerKey *controller,
            GdkNotifyType          detail,
            GtkPopoverMenu        *menu)
 {
-  if (!gtk_event_controller_key_contains_focus (controller))
+  GtkWidget *new_focus = gtk_root_get_focus (gtk_widget_get_root (GTK_WIDGET (menu)));
+
+  if (!gtk_event_controller_key_contains_focus (controller) &&
+      new_focus != NULL)
     {
       if (menu->parent_menu &&
           GTK_POPOVER_MENU (menu->parent_menu)->open_submenu == (GtkWidget*) menu)