Removing Resources from an event with a single click, rather than one session at a time

We use the 'resources' event function to allocate rooms to our events.

Due to changing numbers of delegates vs room capacities, it's common for events to need to move from one room to another room closer to the start of an event. 

You can add resources to all sessions of an event with a single click, but you cannot remove resources from all sessions of an event with a single click. Instead you have to edit the resource for each individual session. This is potentially a large number of clicks: our average event length is 5 sessions.

An option to remove all resources from an event, or a specific resource from an event, with a single click like when you add them, would be great.