[gtk/wip/chergert/quartz4u: 112/116] macos: stay topmost during zoomback

[Christian Hergert <chergert src gnome org>]

commit 4cae27bec84fb66a7f08608d71d0d3d2f3dc87cc
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jun 23 12:03:58 2020 -0700

    macos: stay topmost during zoomback

 gdk/macos/gdkmacosdrag.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gdk/macos/gdkmacosdrag.c b/gdk/macos/gdkmacosdrag.c
index 678fd4ddb7..de1324c674 100644
--- a/gdk/macos/gdkmacosdrag.c
+++ b/gdk/macos/gdkmacosdrag.c
@@ -96,6 +96,9 @@ gdk_macos_zoomback_timeout (gpointer data)
                            (drag->start_y - drag->last_y) * t);
   _gdk_macos_surface_set_opacity (GDK_MACOS_SURFACE (drag->drag_surface), 1.0 - f);
 
+  /* Make sure we're topmost */
+  _gdk_macos_surface_show (GDK_MACOS_SURFACE (drag->drag_surface));
+
   return G_SOURCE_CONTINUE;
 }