Updated mediawiki/skins
Project: mediawiki/skins/BlueSpiceSkin  b8c0db6c07d0c249a9f57f2335c037c5cb948b29

Reenabled CSS navigation icons - Part 1

Removed a bunch of legacy resources
Added nav icon support

Change-Id: Ib2281ca73207f31046b95a3f82bd840dd232fab1