* Add information about encryption of current connection.
* Add information about encryption of AP list.
* Only poll data if visible and no screenblanker active.
* Add view, that shows total signal strength ove rall APs of channel by
  channel in a grafical view to find the less-crowdiest channel to use
  for your own AP
  See (http://www.tomsguide.com/us/pictures-story/121-13-Android-Applications-Smartphone.html).
* Make columns in AP list sortable.
