add debounce to osd events
update jsonblob when save controller config is updated
Merge pull request #206 from IIIF/save-workspace

Save workspace
Merge pull request #207 from IIIF/slot-layout

Slot layout
remove select object button from main menu. save workspace type when updated
Merge pull request #208 from IIIF/remove-select

remove select object button from main menu. save workspace type when updated
added close button
merge with master