Enabling the mobile controller touch controls UI for steam link on PC

[Nergal]

I would like to suggest to put the option to use the mobile controller ui overlay in steam link for PC, when you are linking from one pc to another, instead of only having the option to use the controller or normal pc controls.

As to why, it would at least enable me and several others to map the touch overlay in a way that would give me extra buttons or a keypad so i could adjust my controls, at least in my case by gaming one handed and only on a mouse, it would allow me to play a lot more games.
Like putting a keypad overlay on the screen to have the 4 directional buttons covered in smth like 2d games, while having all the other buttons mapped on my mouse.

It might sound silly, but it would help me a ton and prob also some others, having this feature on steam itself as its own thing would be really helpful, but for an easy way out, the function to do that already exists on mobile, so you could prob port that to pc as well, by allowing the user to press the controller ui with their cursor.