I am posting each of my suggestions separately. I realise that makes a large number of posts, but it ensures that no suggestion gets lost if there are a lot of comments.
Suggestion 6: Currently if I’m in the “Quests” window, I have to close it and then use the menu to open another window (e.g. “Workshop” or “Mail”). I’d like to use the buttons without closing the window first. An alternate solution is to place a set of buttons on each window and use them.