Vim control lines were re-introduced or not entirely cleaned up.
This nukes them again.
Removing from accessible, [root], tools, uriloader, widget, xpcom and
xpfe.
Resolves#1656
Since these are just interpreted comments, there's 0 impact on actual code.
This removes all lines that match /* vim: set(.*)tw=80: */ with S&R -- there are
a few others scattered around which will be removed manually in a second part.
