improve "time gates" map overlays,

 - Alternate "Start x/y" and waypoint name each 2sec ( upperleft corner )
 - Alternate Gate status "Gate Open" -> "Next hh:mm" -> "Wrong side" ( right side )
StrHexToDouble : output param Stop char is not set in all case.

fix commit : b035556b7e30aa78b707eaa2934b117638543c69
Merge branch 'TimeGates' of git://github.com/brunotl/LK8000 into bruno