As title states.
I've added MW, MWExempt and MWCandidate to all headers in LocalSettings. The target for this task is no MWCandidate headers left.
MW -> all suitable settings in ManageWiki already
MWExempt -> all settings aren't suitable for ManageWiki
MWCandidate, MWNCandidate, MWPCandidate -> some settings listed below are suitable for ManageWiki but aren't included yet.