Merge pull request #165 from IIIF/metadata-overlay-overlap#157

Metadata overlay overlap#157
Merge pull request #166 from IIIF/update-event-emission-to-filter-by-window#137#153

Update event emission to filter by window#137#153
Image update events are now namespaced with the unique identifier of the emitter, however, this must be done manually for each event emitter. The default slot id is now set so that clicking the 'select item' menu now targets the first slot in the single workspace. Fixes #138, fixes #153.
Image update events are now namespaced with the unique identifier of the emitter, however, this must be done manually for each event emitter. The default slot id is now set so that clicking the 'select item' menu now targets the first slot in the single workspace. Fixes #138, fixes #153.