The _pass feature emits the password to stdout when the user activates the entry by pressing "enter" but does not emit the password when the user clicks "confirm".
This patch makes it emit the password when the user clicks "confirm".
Well, that's embarrassing. Shows I never use the mouse unless I have to...
Different fix merged in r21075 because I think it makes it clearer what the intent is. (backport to v2.4.x in r21076)
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2058