Visual indication of trucks being assigned to a building

Right now the description window for trucks shows how many trucks are assigned to buildings, but the problem is that when you click on it, it doesn't highlight the truck or bring up which building its for. It just centers it. Then its a game of which truck is the one assigned to what building. Its easy to forget as well.
Would be great to have an indicator that shows that trucks are assigned to a building as I am flying around the map.