Ability to set "Display Number" on "Application Launcher"

[cjuniorfox]

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A great "hidden feature" of Sunshine, is the possibility of using an old iPad as a second display on Linux as mentioned in this article.

I'm able to use it as a second display, but I have to set the Display Number to "1" manually on Configuration->Audio & Video option and start Sunshine with the display adapter enabled beforehand. If I want to play games remotely, I need to disable the additional display (I use a headless HDMI dongle on my display adapter`s second port) and change the Display Number back to 0 (or empty).
Being able to create a "second display" application on the "application launcher" that enables the display adapter by the script and sets the Display Number to 1 during the process of launching the application would be handy.