Updated mediawiki/extensions
Project: mediawiki/extensions/BlueSpiceExtensions  7171d70b4d872c8b93a264a7cb2b78042039fec3

Implemented changes for translatewiki

* Removed trailing dot
* Improved description of two keys
* Changed message for better consistency
* Fixed typo
Removed superfulous word from description

Change-Id: Ib54ff8d59befe9c72fc256aa31bcc0d5d6d94e6c