gnome: fix clutter fullscreen issues

Seems to fix the ocasional image "corruption"
which happens when the video is put into fullscreen
by creating a new VideoWidget in the fullscreen
window and pausing rendering in the VideoWidget of
the main window, instead of moving the VideoWidget.

Refs #74096

Change-Id: Iae87f815545065cf8a799bfa50dd9865a0b8f26e
diff --git a/src/video/video_widget.h b/src/video/video_widget.h
index b456a4e..64fa81f 100644
--- a/src/video/video_widget.h
+++ b/src/video/video_widget.h
@@ -55,6 +55,7 @@
 GType           video_widget_get_type          (void) G_GNUC_CONST;
 GtkWidget*      video_widget_new               (void);
 void            video_widget_push_new_renderer (VideoWidget *, Video::Renderer *, VideoRendererType);
+void            video_widget_pause_rendering   (VideoWidget *self, gboolean pause);
 
 G_END_DECLS