Reset the current group to 0 whenever config change is detected.
Reset the current group to 0 whenever config change is detected.

This avoids some weirdness when the layout change causes the current
group to change/disappear. Besides, we're resetting the rest of
the settings anyway.

igors/xfce4-xkb-plugin,igors/xfce4-xkb-plugin,igors/xfce4-xkb-plugin