[Ohrrpgce] SVN: teeemcee/12594 Fix item screen plank size

[subversion at HamsterRepublic.com]

teeemcee
2021-10-29 20:56:30 -0700 (Fri, 29 Oct 2021)
210
Fix item screen plank size

I didn't change its slice when I moved it from the separate collection, so I
don't understand why it previously appeared with the expected size despite
having the wrong size on disk.
---
U   wip/sourceslices/default_item_screen.slice