[gtk/wip/chergert/macos-fixes] macos: handle sizing changes when switching monitors

[Christian Hergert <chergert src gnome org>]

commit 2be51dc3b11a5d8dadb648efe033074becc8f0a4
Author: Christian Hergert <christian hergert me>
Date:   Fri Feb 4 12:29:57 2022 -0800

    macos: handle sizing changes when switching monitors
    
    This should make sure that our scales are updated as well as
    ensuring we repaint the whole surface.

 gdk/macos/gdkmacossurface.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index 6374f84e00..c5cf05edf8 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -994,6 +994,9 @@ _gdk_macos_surface_monitor_changed (GdkMacosSurface *self)
 
       g_object_unref (monitor);
     }
+
+  _gdk_surface_update_size (GDK_SURFACE (self));
+  gdk_surface_invalidate_rect (GDK_SURFACE (self), NULL);
 }
 
 GdkMonitor *