Keep favorite communities at the top of the list

Currently anytime you join a community it shifts the entire list down since the newly joined one is put at the top. If I want to keep my favorite communities at the top I have to rearrange the icons every time.

Either make new community icons appear at the bottom (so the list never shifts down), or let me Pin communities so that they stay at the top. In other words, once I put a community at the top it should stay there.