[samibe]

I would like this a lot. I think I would prefer an icon next to the bookmarks, metronome, etc. (with similar behavior).
Perhaps missing tabs could be dealt with by not allowing those links to work (have the information visible but gray). Include a note that the tab needs to be enabled in the settings for the links to work.
I think I already have all of the tabs enabled because I use them to help with keeping the metadata clean and organized.