This update fixes boo#898919 with other usage obstacles found by packager herself.

* ibus-hangul can't be called out if it's the only engine. (So no ibus icon on systray)
* ibus-hangul can't be switched from other engines by hot keys (Shift + Ctrl), have to click by mouse
* ibus-hangul can't be toggled from, eg, English (Ctrl + Space)
* ibus-hangul-setup can't be shown because of a Gobject error