Denkan

Fixed bug causing nv-file-over (over-class) not resetting when leaving element. Issue e.g. #514 and #231. Fixed by removing the check (and cancel) if the event.currentTarget is same as the nv-file-over...

**Friendly feature request:** Provide a _Cancel_ button when hitting the "Run on device" or "Build". Every now and then Sidekick hangs when running/building with the action button stuck at loading,...