Re-arrange some elements in room settings

We can remove a lot of duplicative labeling here: "Room Information", "Room Name", "RoomTopic", etc. The "Save" button now looks like a proper form card element, like it does in the account editor.

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This has (as I've seen) confuse some users because we put this information front and center. The internal room ID and it's version isn't relevant for 99% of users, especially since most of them don't even have permission to touch these.

Instead, let's do what Element smartly does and put it under an Advanced page you have to intentionally find. This also has the knock-on effect of propping up the importance of room aliases, which now appear higher in the general settings.