[Ohrrpgce] SVN: teeemcee/11071 valid_resizable_slice now disallows resizing slices Covering Children

[subversion at HamsterRepublic.com]

teeemcee
2019-03-29 22:00:38 -0700 (Fri, 29 Mar 2019)
287
valid_resizable_slice now disallows resizing slices Covering Children

You can't yet create slices which CoverChildren either by script or in the
slice editor. This is just forward-looking work.

Also cleanup and reduce "cannot be resized while filling parent" from serrBadOp
to serrWarn
---
U   wip/scriptcommands.bas