[Ohrrpgce] SVN: teeemcee/13243 Use a multichoice box for Custom's quit message, and delete sublist()

[subversion at HamsterRepublic.com]

teeemcee
2023-04-25 00:05:50 -0700 (Tue, 25 Apr 2023)
207
Use a multichoice box for Custom's quit message, and delete sublist()

Don't know why I didn't do this a decade ago, I've always found the quit prompt
ugly!

And save_current_game now also uses basic_textbox
---
U   wip/custom.bas
U   wip/customsubs.bi
U   wip/customsubs.rbas