Well, this feature would be for GUI programs in their own window, so no need for input from the tab, just output of possible error messages.
Well, I guess a narrowly focussed feature might be suggested to go in a plugin then. There are several other things a plugin that executes stuff could provide as well, to get more value out of it.
I don't mean to sound like one of those "what do you want to do THAT for" people, but .. :)
I guess the extra window has never bothered me, and it has the advantage that its movable so I can put it where I can see it, Geany is usually full screen so its hard to move and its also usually obscured by the new programs window.
P.S. I responded to you directly before by accident, and then to the list...I don't know if you wanted to respond to me directly here or to the list (for posterity's sake :) ...sorry for the confusion).
Wondered why it turned up twice, nvm, should be back on the list now.