[bugfix] new regex for retrieving page titles from special page.

The title part or list elements may contain html entities which
will be interpreted as section while instanciating the page and
leads to an invalid title exception (e.g. invalid section in
category).

Now the page title will be fetched from that part inside the <a />
tag.

Change-Id: I15383809fbb911e4d8722dfb87c04b71d182bf7f
Merge "[bugfix] new regex for retrieving page titles from special page."