[Ohrrpgce] SVN: teeemcee/12742 popup_choice, a multichoice variant for popup menus where you clicked

[subversion at HamsterRepublic.com]

teeemcee
2022-02-04 21:17:59 -0800 (Fri, 04 Feb 2022)
217
popup_choice, a multichoice variant for popup menus where you clicked

Also added MenuState.draw_selecting, MenuDef.suppress_borders, and 'where'
arg to multichoice(). (The centerlines arg was unused so I removed it).
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U   wip/common.bi
U   wip/common.rbas
U   wip/custom.bas
U   wip/menus.bas
U   wip/udts.bi