[Ohrrpgce] SVN: teeemcee/9727 Remove line slices from the editor again. Still available in priviledged

[subversion at HamsterRepublic.com]

teeemcee
2017-11-22 19:40:32 -0800 (Wed, 22 Nov 2017)
269
Remove line slices from the editor again. Still available in priviledged mode

Because I'm not totally comfortable with how negative slice sizes are handled.

Any existing slice collections will continue to work in-game... but they
will count as forbidden in the editor
---
U   wip/IMPORTANT-nightly.txt
U   wip/sliceedit.bas
U   wip/whatsnew.txt