dfb97c1ed7
As a stop-gap measure until we have a native input method tray icon, add ibus-ui-gtk to STANDARD_TRAY_ICON_IMPLEMENTATIONS so that the IBus status icon shows up in the status area rather than in the message tray. The message tray location doesn't work for the function of showing the current input method when switching between windows or changing input methods. https://bugzilla.gnome.org/show_bug.cgi?id=641531