Temporarily disabled video card selection when using gamescope and also cleaned and fixed the code and localization

I tested the code on a computer with GTX 1650 and everything worked correctly, but it remains to test on RTX 20, since there is the same Turing and the script can confuse them (although it should not)

Unfortunately for lack of a 16 series card the code was not tested

Replaced which with command -v since which is already deprecated
Replaced lsb_release -d with cat /etc/os-release since this method is more universal
Fixed a couple of typos in the PortProton installation script