removed add widgets hack-feature

--this was creating some issues probably with panels
--fixed bug of not rotating activities icon on hover
remove theme support completely
Disable hard coded button sizes
small font fixes
when filtering windows hide workareas with no results
improve workareas appearance when filtering windows
added ESC as a way to hide plasmoid in panel / dashboard
moved DraggingInterfaces to relevant folder
restore main tooltip when the plasmoid is in the panel
new strings for translation

--fix tranlations directory to use automatic fetching from
transifex
fixed windows behavior in desktop dialog
added previews refresh button in calibration dialog
fix appearance for only one window in desktop dialog

--improved appearance for refresh previews functionality
--fixed appearance of desktop dialog for only one window