Add Combined arms spawn slot like aircraft have upon mission start

[Johnny Johnny Johnny]

So I have started tinkering more with CA lately and is trying to do some immersive single player missions with ground units only, all is well except the mission start part, since the vehicles does not get a spawn selection like airplanes do, the player must go F10, find my particular vehicle I intend to be used for the mission, and then the player needs to click the tank icon to join.  

So my wish would be to be able to select the driveable ground unit like any other airplane upon mission start. Perhaps a checkbox to allow it to appear upon mission start to avoid having spawn list cluttered with all available ground units in a mission where it can be both a lot of planes and ground units available.