background cancellation for Bq measurements

[nokton]

background cancellation for Bq measurements (at startup, use first minute measurement as background and subtract from current CPM before converting CPM to Bq) -- use parameter in bGeigie config file -- “bqd” --> “auto” (use first minute as back ground” or integer (fixed offset) -- default “bqd=0”

Enable from parameter, or use Fn key at startup to enable background auto adjust (take average of first minute)