Alarm and response

Quote from Missionchief17

It would be useful if we had a deselect all button up by the top where the A&R is so if we click the wrong one we can easily deselect the units, instead of going back to call list and finding the call or finding all the units it already selected and deselecting each one.

I think the game has an option so when you click on and ARR it deletes de previous selected one, but, I have for example "2 engines" and "ambulance" and if I click on the wrong ARR it can be a really boring thing when dispatching multiple calls, or any time honestly

Love the idea!