Currently GLib doesn't consider Ptyxis when deciding which terminal to launch an application with. Ptyxis is our new default terminal, so we should use it

Test case: create a script, chmod +x to make it executable, right click on it with nautilus, Run as a Program

Recommended test script:

#!/bin/sh
aoeuaoeu;

It's invalid nonsense to ensure it fails, which makes it easy to see which terminal the script has opened in.