Merge branch 'wip/carlosg/x11-artifacts' into 'main'

gdk/x11: Invalidate whole surface after size change

See merge request GNOME/gtk!5857

gdk/x11/gdksurface-x11.c

@@ -201,6 +201,8 @@ gdk_x11_surface_update_size (GdkX11Surface *self,
       cairo_surface_set_device_scale (self->cairo_surface, scale, scale);
     }
 
+  gdk_surface_invalidate_rect (surface, NULL);
+
   return TRUE;
 }