on my system 'grep ^w /proc/net/wireless' doesn't return a result due to
leading space being present in front of wlo1 wifi iface:
" wlo1: 0000 55. -55. -256 0 0 0 0 5"
As a result the signal icon wasn't showing up. Solution is to strip it. Tested on T430s which was ok to begin with, no
regression.
2c7e1cd0bc