If an invitation is opened in a secondary window, close that window when the handlers are invoked. Otherwise the user is confused, and the mail underneath moves away, while the secondary window remains open and the user can invoke the handlers again. While that is not strictly a problem, this way is more intuitive, I believe. (See: https://intevation.de/roundup/kolab/issue859)

svn path=/branches/KDE/3.5/kdepim/; revision=439559