kimpanel-ibus-panel uses IBusConfig and I'd ask to migrate it to GSettings and delete IBusConfig.
https://groups.google.com/forum/#!topic/ibus-devel/Mu1IoFX-bKE
Created attachment 109877 [details] Patch for panel.cpp Suggested patch.
Can we integrate the patch?
I suggest to add your patch to https://phabricator.kde.org/differential/diff/create/
I created the code review request: https://phabricator.kde.org/D11061 I don't know about the reviewers.
https://phabricator.kde.org/R119:e2a29f8ea072e6c733a8d6b995a2177131f2b939