Overlay availability of participants while dragging an event

[st3iny]

Is your feature request related to a problem? Please describe.

Let's say I have a recurring event with a colleague and I reschedule a single ocurrence by dragging it around.

I have no idea when the other participants are available during dragging and I might move it to a time slot during which they are not available.

Describe the solution you'd like

It would be nice to do a FREEBUSY request as soon as the organizer starts dragging. The results could then be shown as a temporary overlay in the grid and vanish again as soon as the organizer stops dragging.

Describe alternatives you've considered

No response

Additional context

Proposed by @ChristophWurst

[ChristophWurst]

The results could then be shown as a temporary overlay in the grid

https://fullcalendar.io/docs/background-events is an option for that