Provide option to override default (gnome terminal) and launch with xTerm OR allow fallback when gnome terminal fails to launch with xTerm

I regularly use vscode remotely via ssh X11 forwarding when debugging code that uses dedicated hardware. I am unable to debug unless I uninstall gnome-terminal since gnome-terminal does not seem to work over X11 forwarding. Attempting to debug with gnome-terminal installed comes up with the message "Unable to start debugging. Failed to initialize debugger terminal."

Per statement by @pieandcakes in Issue #409 :
"we try and use gnome-terminal and fall back to xTerm for our debugger terminal"

Removing gnome-terminal and installing xterm makes debugging possible. Could we please get an option to set which of the two terminals is preferred? Or could it fall back to xterm when gnome-terminal fails to launch? It would be nice to keep gnome-terminal installed for when I am physically at the PC.

• Ubuntu 17.10
• VS Code 1.20.1
• C/C++ extension 0.15.0

L'issue non indica file del repository né test; inizia esaminando il comportamento di avvio del debugger-terminal e la discussione sul fallback nell'issue #409. Riproduci il problema con gnome-terminal installato tramite inoltro X11, quindi verifica che la preferenza del terminale richiesta o il fallback funzionino senza compromettere il debugging locale.