bug/char_sheet_margins

Issue reported by @FlyingSucculent and @CESN here.

Can be repro'd using this:
live
mapdm

I can't see what the issue is because the link just tells me not to peek behind the GM screen

Huh. CESN must have stopped it from being a public thread.

Anyway - the two examples here show the problem with custom character sheets with avatars and background images.



The avatar should just peek over the line (there's a margin to prevent content crashing into it).

I've been skipping a space at the top of the sheet and putting a period there which mitigates that crash.