Fixes: Update selected keyboards properly.
Fixes: Update selected keyboards properly.

Details: Properly update selected keyboards when the keyboard list
dialog is opened.

RevBy: Jon Nordby

develersrl/maliit-demo-qml,maliit/plugins,develersrl/maliit-demo-qml,RHawkeyed/plugins,RHawkeyed/plugins,develersrl/maliit-demo-qml,maliit/plugins,RHawkeyed/plugins,KDE/plasma-maliit-plugins,RHawkeyed/plugins,RHawkeyed/plugins,maliit/plugins,KDE/plasma-maliit-plugins,KDE/plasma-maliit-plugins,develersrl/maliit-demo-qml,KDE/plasma-maliit-plugins,maliit/plugins