This test checks that the tracks' breadth are recomputed after removing a grid item. XXX XXX XXX PASS PASS PASS XXX XXX XXX PASS PASS PASS XXX XXX XXX PASS PASS PASS XXX XXX XXX PASS PASS PASS XXX XXX XXX PASS PASS PASS XXX XXX XXX PASS PASS PASS XXX XXX XXX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS XX XX XX XX XX XX PASS PASS PASS