made sure dropdown is deleted if no items are passed via the items set event
added delete dropdownb method
fixed merge conflicts
fixed merge conflicts
added hide and show event for buttons
fixed merge conflicts
Merge pull request #173 from massiveart/fature/tabs-styling

adapted tabs styling
fixed merge conflicts
Merge pull request #168 from massiveart/feature/edit-toolbar

feature/edit-toolbar
merged with develop; added current build files