LOG LED

Fix for LOG LED/ GPS locked aand radiation data valid to be switch of
if GPS or radiations data becomes unavaliable
Higher than 100uS/h fix
Display units small if over 1kCPM

In bGiegieMode over 1k CPM display switches to smaller unit to allow
more digits to be displayed.
In xGiegieMode over 5k CPM display switches to smaller unit to allow
more digits to be displayed.