fix #1784 airplane refresh oncreate

fix #1784
fix #1797
fix #1386

This string resource is still being used by [PostsListAdapter](https://github.com/wordpress-mobile/WordPress-Android/blob/issue/1784-airplane-refresh-oncreate/WordPress/src/main/java/org/wordpress/android/ui/posts/adapters/PostsListAdapter.java#L108).