User visible changes in the firmware version 3.7.3p1 since version 3.7.3.

                             Highlights.

1. Fixed critical bug in SVs tracking. This bug fires whenever
   parameter "/par/raw/corr/ca/carrier" is set to "normal", in
   particular for all receivers without "advanced multipath reduction"
   option being purchased. After reacquisition of temporary lost
   signal pseudorange measurements may be permanently wrong for up to
   several tens of meters.
   
2. BLUETOOTH: fix incompatibility with Windows 10 version 1803.
