Updated mediawiki/extensions
Project: mediawiki/extensions/BlueSpiceExtensions  10267686ec56ec0571896f4f89c3311ccbe30c5f

Implemented changes for translatewiki

* Removed trailing dot
* Changed messages & description for consistency
* Improved message

Change-Id: I33f93df6cb722b7fa370a28de84f4af3334da49a