wireless: update %signal and %quality based on station info on Linux (#368)
wireless: update %signal and %quality based on station info on Linux (#368)

Use station info instead of bss info to update %signal and %quality.
Bss info is based on scan info and doesn't get updated often. Station
info get's updated with every beacon. Bss info still used as fallback.
Dettorer/i3status,Dettorer/i3status,Dettorer/i3status,peder2tm/i3status-netdev,i3/i3status,Gravemind/i3status,Dettorer/i3status,peder2tm/i3status-netdev,Gravemind/i3status,Gravemind/i3status,i3/i3status,i3/i3status,peder2tm/i3status-netdev,peder2tm/i3status-netdev,Gravemind/i3status,i3/i3status