Insert(e1):Append(e2) Hidden(e1):Viewable(e2)
- foobar_e1 should be directly to the left of artist
- foobar_e2 should be on the far right
- both foobar_e1 and foobar_e2 should be in the column picker for this page
- only foobar_e2 should be in the column picker for the main library