replace backslash with forward slash when fetching the supported mimetypes, since qsettings returns mime with backslashes
replace backslash with forward slash when fetching the supported mimetypes, since qsettings returns mime with backslashes

shadeslayer/phonon-gstreamer,shadeslayer/phonon-gstreamer,KDE/phonon-gstreamer,KDE/phonon-xine,KDE/phonon-directshow,KDE/phonon-waveout,KDE/phonon-mmf,KDE/phonon-xine,shadeslayer/phonon-gstreamer,KDE/phonon-quicktime,KDE/phonon-xine,KDE/phonon-gstreamer,KDE/phonon-directshow