"Prevent widowed words in article titles" preference aka "title_no_widow" defaults to "No".

Fixes issue #377.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5446 2fea6a4d-a838-0410-917b-93a53c48e9d2
Merge remote-tracking branch 'upstream/master' into jquery-ui-integration