* Wrote new KCM based on KQuickAddons::ConfigModule.
* Remade QMLs for Buttons and Themes tabs, moved options to a third tab.
* Updated bridge model code for new plugin lookup API (fixes warnings).
* Fixed decoration shadow changing messing with the previews sizes.
* Fixed drag and drop issues (see D18104).
* Removed apply button in previewbridge.cpp: After applying changes, the theme's KCModule is somehow not valid any more and changing more options does nothing (it can also cause a crash). Maybe good for a separate discussion?
BUG: 389431
BUG: 350122
BUG: 346222
BUG: 342816
BUG: 397595
{F6574963} | {F6574962} | {F6574961} | {F6574960}