don't reset Number of Time Gates on clear task.
Refactoring Bluetooth read/write : needed for working Task declare to external device
IMI Erixx : use hardcoded baudrate (4800) when the port doesn't support it.
Fix wrong assertion check in visualglide
Merge branch 'BthFix' of https://github.com/brunotl/LK8000
Merge branch 'TimeGates' of https://github.com/brunotl/LK8000