[Ohrrpgce] SVN: teeemcee/9134 Add game/edit.gfx.backend global config option to select the graphics ba

[subversion at HamsterRepublic.com]

teeemcee
2017-08-05 08:06:07 -0700 (Sat, 05 Aug 2017)
195
Add game/edit.gfx.backend global config option to select the graphics backend

This is only checked once on startup. No per-game switching

It's set by the Ctrl-F8 graphics backend switching menu
---
U   wip/backends.bas
U   wip/config.bi
U   wip/custom.bas
U   wip/game.bas