New Sorting Order When Selecting Castles

[Blindgoofball]

Alright, I know someone out there has to have this problem, especially when you have a lot of castles. When you want to keep things constantly upgrading, you want to keep your building queues full. However, there is no way to sort your castles by open building queue slots. If this was added, it would greatly simplify the process of upgrading a lot of buildings constantly.