Grey build pics out when limit reached

[KDR_11k]

It would be nice if buildpics were greyed out or otherwise marked as unavailable when the corresponding unit has reached its unit limit so you know what's on the field already.

[rattle]

Perhaps a small counter in the top right of the build pic telling you how much units are deployed and the limit if there's one. I'm pretty sure this can be done with LUA.

[KDR_11k]

I'm not sure if LUA is the right place for it, the limit is enforced by the engine so shouldn't the engine also display it?

[MadRat]

Perhaps trepan or jc could apply an alphamask to the buildpic to at least change it from its normal look to a new look. Even a red mask instead of gray would look nice. Then again a black mask might be more consistent.