[Ohrrpgce] SVN: teeemcee/10815 Fix "Previous Menu" option in attack damage bitsets menu not working

[subversion at HamsterRepublic.com]

teeemcee
2018-10-27 20:58:33 -0700 (Sat, 27 Oct 2018)
302
Fix "Previous Menu" option in attack damage bitsets menu not working

I broke this while fixing a similar problem in the textbox export menu recently

editbitsets now returns an enum instead of a bool. Over the top maybe, but
better than squeezing three alternatives into a bool based on args passed in
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U   wip/attackedit.bas
U   wip/common_menus.bas
U   wip/common_menus.bi
U   wip/textboxedit.bas