[Ohrrpgce] SVN: james/9294 Fix plank menu mouse wheel scrolling to not move the selection cursor

[subversion at HamsterRepublic.com]

james
2017-09-06 09:31:03 -0700 (Wed, 06 Sep 2017)
226
Fix plank menu mouse wheel scrolling to not move the selection cursor
Also fixed a cosmetic bug with scroll position when the thingbrowser is first opened (was almost always needlessly putting the pre-selected item at the top)
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U   wip/plankmenu.bas
U   wip/plankmenu.bi
U   wip/thingbrowser.bas