ontop lid incompatible with default TypeTray separators

[jasondunsmore]

When an ontop lid is used with a TypeTray that has separators, the alignment pieces run into the separators. As a possible fix, the inner height of inner walls should be made lower when ontop lid is used. Alternatively, there could be a small cutout in the tops of the separators to allow clearance for the alignment pieces.

To Reproduce

boxes TypeTray --sx=100/2 --sy=100/2 --h=100 --top_edge=e --Lid_style=ontop --gripwidth=0

Expected behavior

The lid should fit on the box.