Ability to add an existing occurrence to any other occurrence, without having to delete/cancel and re-create that occurrence.

When a requester submits multiple requests for the same site on different dates, if they use different times on each date, the requests are not grouped together under multiple requests or recurring requests (even though they are all really part of the same request). Would like the ability to simply add an existing request to a multiple request or recurring request without having to delete the existing request, and then re-create it manually by adding a space to a multi-request or recurring event.