[Ohrrpgce] SVN: teeemcee/13411 Fix corrupted UI cols or master palette on some error screens or menus.

[subversion at HamsterRepublic.com]

teeemcee
2023-12-15 02:04:32 -0800 (Fri, 15 Dec 2023)
407
Fix corrupted UI cols or master palette on some error screens or menus.

push_and_reset_gfxio_state changed the master palette but if the previous 8-bit
color screen contents were kept underneath (holdscreen) -- namely show_help,
engine_settings_menu and multichoice -- then they would be mangled. So switch
to 32-bit color.

And ensure_normal_palette changed the master palette but not the uicols to
match.
---
U   wip/allmodex.bas
U   wip/common.rbas