userguide: explain why Mod4 is usually preferred (#3018)
userguide: explain why Mod4 is usually preferred (#3018)


i3/i3,stapelberg/i3,Airblader/i3-original,Airblader/i3-original,i3/i3,Airblader/i3,stapelberg/i3,stapelberg/i3,Airblader/i3-original,Airblader/i3-original,i3/i3,Airblader/i3,stapelberg/i3,Airblader/i3,i3/i3,Airblader/i3-original,Airblader/i3