Queue Extensions On Alliance Buildings

I expect this to get some pushback as it's a premium feature, however hear me out.

When building an alliance building as a regular user (no premium), you have to get all of the extensions one at a time. With premium, we're able to queue them.

This is honestly a pain, especially when it comes to prisons, where each of the 20 extensions take 7 days, so we'd have to remember which prisons, and check back every week to build the next cell. Allowing people to queue extensions on alliance hospitals/prisons/training rooms would make the whole building alliance infrastructure much easier for the non-premium members who want to help out!