Editing Wifi width removes invalid channels

I suggest making the link between channel width and possible channels more obvious. This suggestion is for the wifi radio edit screen.

  1. Please change the order of Operating frequency -- Mode Channel Width to Mode width Channel.

  2. Based on the new wifi width please remove invalid channels. E.g. choosing a width of 160 MHZ should remove most of the channels since they are not valid for 160 MHz. A channel width of 20 MHz should show all the channels.