Scheduler drag-n-drop: eventDrop should show previous resourceId

[danielsmacdonald]

The eventDrop callback has these arguments: (event, delta, revertFunc, jsEvent, ui, view). When used with Scheduler, event.resourceId represents the new location of the event. Could we have something to represent the old location (resourceId before the move)?

Maybe replace delta with prevEvent object? Or just add a property to event, something like event.prevResourceId or event.prevLocation.

Currently I'm adding the resourceId to the event in duplicate (one with a different name) so only one gets overridden and I can still read the old one. But this is messy and error prone.

[arshaw]

moved this feature request over here: fullcalendar/fullcalendar-workspace#39