[Ohrrpgce] SVN: teeemcee/8655 Add NextDescendent() to iterate slice trees, and use it to simplify plan

[subversion at HamsterRepublic.com]

teeemcee
2017-04-19 06:57:10 -0700 (Wed, 19 Apr 2017)
82
Add NextDescendent() to iterate slice trees, and use it to simplify plankmenu code
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U   wip/plankmenu.bas
U   wip/plankmenu.bi
U   wip/slices.bas
U   wip/slices.bi