Add the patch created by KDE people, that addresses a very annoying
problem in many Qt-based programs -- tabs are replaced by spaces. The
patch is straight from KDE's qt-copy CVS tree and should be present in
the next version of Qt. Bump PORTREVISION.
While here, stop requiring exact versions of png, jpeg, and mng --
anything the user's system has at the time of port-building will satisfy
Approved by: Andy Fawcett (as part of kde@ -- the maintainers)