Updated mediawiki/extensions
Project: mediawiki/extensions/ListSignup  ffccd7f7ff0364e6585bb78d66782577907ebdc1

Consistency tweaks in preparation for adding to translatewiki.net

* Remove Title Case
* Add right- messages

Change-Id: Ib4a2f33fc6180c241e8c9f90f38cb75678f25e20