create default (for opening links/mailtos) the first time on the fly
ps -A | grep kwin 6620 ? 00:00:09 kwin
KDE WM [chances are he runs KDE]
xfwm4 for XFCE4 [but not xfce4-open or sth]
metacity and sawfish is GNOME
so default to sth the first time gajim runs