[GRASS5] [bug #1407] (grass) don't ignore C-z suspend in many forms

[Request Tracker]

this bug's URL: http://intevation.de/rt/webrt?serial_num=1407
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Subject: don't ignore C-z suspend in many forms

Platform: GNU/Linux/i386
grass obtained from: Mirror of Trento site
grass binary for platform: Compiled from Sources
GRASS Version: 5.0pre1

many grass programs ignore C-z, the suspend char, for no good reason, during,
e.g. a form filling out session.  Yes, some of us might still prefer to
use the C-z to do some quick shell commands [with the grass envronment] rather than
start another window with their window manager.

At least d.3d ignores C-z.

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