Give RC/Watchlist titles the mw-title html class

This html class is used in coordination with a wrapper on the
<li> for the whole row to bold specific titles of interest to
the user like watchlisted titles or titles updated since last
visit.

Bug: 66876
Change-Id: Ia05adf25259f303d1dd1e47ea2336dd2b7724314
Merge "Give RC/Watchlist titles the mw-title html class"