Constant upgrades

There is always that time when you cant be on but you want upgrades to be going even after the current upgrade that you started finishes. I was thinking that maybe a page could be added on which you can select a list of tasks for your builders to do as long as you have enough recorces. So say i finish upgrading my cannon and i want my town hall to be upgraded next, i put the town hall on the upgrade list before hand and its upgrade starts as soon as the other upgrade finishes. Then you don't have to hop on every time and upgrade finishes and you can have upgrades being done constantly. That is my idea for upgrades