main: Override focus-change-on-pointer-rest preference

The application menu is currently unusable with non-maximized
windows when using focus-follows-mouse mode. Override mutter's
focus-change-on-pointer-rest preference, so that the actual
focus change is delayed until the pointer stops moving.

https://bugzilla.gnome.org/show_bug.cgi?id=678169

src/main.c

@@ -178,6 +178,8 @@ shell_prefs_init (void)
                                          OVERRIDES_SCHEMA);
   meta_prefs_override_preference_schema ("edge-tiling",
                                          OVERRIDES_SCHEMA);
+  meta_prefs_override_preference_schema ("focus-change-on-pointer-rest",
+                                         OVERRIDES_SCHEMA);
 }
 
 static void