use execvp to support mixer programs with arguments
fix invisible icon on gtk3
- tray_icon has to exist before prefs are applied for correct icon
- gtk_status_icon_is_embedded returns false until the prefs window is opened on gtk3 for some reason
fix spelling mistake (aquire_hotkey -> acquire_hotkey)
...still didn't fix the hotkey issue though :)
didn't need that extra gchar**, oops!
Fix keybindings
exit gracefully from the menu
IMO "ERROR 208" return value isn't graceful! It closes down properly now, return 0.
Merge branch 'stevenhoneyman-gtk3' into gtk3
Fix -Wparentheses compiler warning