should not interfere with popped up message boxes. Still there is a issue
with childs during splash startup: when one of them crashes with core dump
crash dialog will not be shown, but the main process handler correctly returns crash flag.
second and rest would be fine. That is hopefully fixed now.
Splash window still gets hidden by old eiconman; for other apps it is fine. Pending for revision.
without possible stealing from fltk. Prevous, add_handler(), would send only
unknown events for fltk which leave us without really important ones, like selection events
used by XSETTINGS manager.
Added XSETTINGS support (yet unfinished) which will make evoke as XSETTINGS manager.
executable was not found or file is not executable.
Add mutexes since childs return codes comes from second thread. This
will also prevent races when report dialogs are shown.
