I'm never using the windows key but for whatever reason on my laptop keyboard I often hit them by mistake trying to hit ALT.
How can I configure xkb so that the left windows key acts as an additional alt key? (so, yes, I do want both the physical ALT key and the windows key next to it to both act as if they were ALT)
As a bonus, how can I configure the right windows key to act as an additional AltGr?