Fixed communitytwitter-logged-in-as message.

Reduced patchworking in communitytwitter-logged-in-as message as per:
<https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Communitytwitter-logged-in-as/en>

Change-Id: I5b9329c44a5d0256243dd74ea8812108d037d269