renderer/native: Queue mode reset from new rebuild_views vfunc

Simplify the call site a bit and make the native renderer know it should
queue mode reset itself when views have been rebuilt. This is done
partly due to more things needing to be dealt with after views have been
rebuilt.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/630

src/backends/meta-renderer.h

@@ -43,6 +43,7 @@ struct _MetaRendererClass
   CoglRenderer * (* create_cogl_renderer) (MetaRenderer *renderer);
   MetaRendererView * (* create_view) (MetaRenderer       *renderer,
                                       MetaLogicalMonitor *logical_monitor);
+  void (* rebuild_views) (MetaRenderer *renderer);
 };
 
 CoglRenderer * meta_renderer_create_cogl_renderer (MetaRenderer *renderer);