Update build.py

[suchyindustries]

As d4lf doesn't update changes "on the fly", I think everybody's behaviour is: after setting up in GUI, start the main program. So this is my proposed change: From now on, after "d4lf.exe --gui" closes, it will automatically start the main d4lf.exe. Try it yourself with this batch script:

@echo off cd /d "%~dp0" d4lf.exe --gui start "" d4lf.exe

[cjshrader]

I don't think this really matches how I personally use d4lf. I keep the GUI up a lot even if I don't have d4lf running. I wouldn't want d4lf to automatically run when I close it, especially since we have nothing in place at this time to prevent multiple copies of d4lf from running.

I have a suggestion post in discord for ways to handle stopping/starting d4lf and I'd love your feedback there. I haven't been able to work on it much at all lately.