Switch between training camps without closing them

With up to 4 training camps and the Hero academy now it would be nice to have a quick and easy way to switch between them. There are lots of times when you end up switching between them a lot and having to close one and open the next could be easier and quicker. When you are adding more training to keep them balanced, collecting heroes or swapping stuff from one training camp to another to bank or unbank food. Some sort of left right arrows at the top/bottom that would cycle through the training camps and Hero Academy would work.