Workareas data engine is here and functional...

--Data engine is here and keeps in sync all the data about
workareas. Someone can add two workflow plasmoids and the
workareas will be all the time synced...
--next steps are activities ordering and selection mechanism
now that the engine is ready. For the ordering an Order field
can be added to the workareas data engine. After that Ordering
can be done based on this field in the ActivitiesEnhancedModel