Updated mediawiki/extensions
Project: mediawiki/extensions/BlueSpiceExtensions  ef0650ff64b13bcfabab60214ff202475488f3fd

Implemented changes for translatewiki

Moved to Json i18n files
Added periods
Improved preference message
Changed unit to plural

Change-Id: I45fc49af74009094d7dac7f14c42f8212278a612