[Ohrrpgce] SVN: teeemcee/11514 Fix open_process graphical/see_output=YES not working on Windows; improv

[subversion at HamsterRepublic.com]

teeemcee
2019-12-28 18:37:51 -0800 (Sat, 28 Dec 2019)
206
Fix open_process graphical/see_output=YES not working on Windows; improve documetnation

I didn't know that CREATE_NO_WINDOW also hides output from commandline programs.
Renamed graphical arg to see_output.
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U   wip/os.bi
U   wip/os.h
U   wip/os_unix.c
U   wip/os_windows.bas