Insert(h1):Append(h2) Hidden(h1):Hidden(h2)
- foobar_h1 should be directly to the left of artist
- foobar_h2 should be on the far right
- both foobar_h1 and foobar_h2 should be in the column picker for this page
- neither foobar_h1 or foobar_h2 should be in the column picker for the main library
- BUG: foobar_h2 shows up to the right of foobar_h1
- BUG: the splitter between foobar_h1 and foobar_h2 is not resizable