Updated mediawiki/extensions
Project: mediawiki/extensions/BlueSpiceExtensions  58b5f5c9e59bb680c74780e0c0cd8f4fc5c840bf

Searching in categories

Maybe solved problem with thumbnails in InsertFile
Filter provides search in categories now
Message key for filter is lowercase now
Get tablename the mediawiki way

Change-Id: I8b3f40e29eb548b91f4119ef568d99890eb63e7c