[Ohrrpgce] SVN: teeemcee/11682 Enable native-kbd input on X11 for backends other than gfx_sdl

[subversion at HamsterRepublic.com]

teeemcee
2020-04-04 23:00:51 -0700 (Sat, 04 Apr 2020)
262
Enable native-kbd input on X11 for backends other than gfx_sdl

This improves the fix to bug #1064, which unconditionally disabled native
input to avoid random frozen input under gfx_sdl.

Native input is toggled on/off as you switch between backends at runtime.
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U   wip/allmodex.bas
U   wip/misc.bas