Main Menu buttons disappeared

So I played back at launch and had customized my UI a decent bit. I ended up letting my sub lapse before 2.1 and since coming back I noticed the menu buttons have changed. Given their smaller size I decided I wanted to change their position a bit. After trying to do that in the hud layout page, the buttons disappeared in my actual UI. No matter where I move them, the buttons will not actually appear. Resetting to default, logging in and out (or exiting out of the game completely) none of this seems to solve this.

Edit: And I solved it. Apparently right-clicking a menu item will cause it to disappear. And doing so again will make it reappear. I must have accidentally right clicked it. While I love being able to customize a stock UI like that, it could be a little less... obscure about all its options.