Add possibility to disable stdin

[bugy]

Many scripts don't expect user input during runtime, so it would be nice to disable an input field.
Some problems with this input:

1. It's a bit confusing (asking for input, when nothing is needed)
2. On mobiles, it makes a keyboard to open automatically
3. It could interact in a bad way with Add support for stdin parameters  #278

[mitchtchesnitch]

This would definitely help bullet-proofing the app! Cheers!

[enriquetoledano]

I also would like to see this implemented.
Best regards

[Snify89]

Would love to see this implemented as well.
Thank you for considering