Level-D weiteres Update

[Holly]

Hallo Rainer, hier die Änderungen

- Fixed heading discrepancy in HDG SELECT mode
- Fixed EHSI heading sometimes showing negative values in VOR/ILS views.
- Bug fixed in direct-to which could cause crashes
- direct-to now shows leading curve when executed
- ALTN pages
* shows ETA/FUEL for alternate airports, sorted by ETA
- ALTNXXXX pages
* allows entry of Flight Level
* allows entry of Speed (numeric entry, SPD, ECON or LRC)
* allows entry of Wind
* allows selection of Overhead option
* predictions updated based on manual entries of ALT, SPD, Winds
- ADF radios tune in 0.5 increments
- a bug in the FLCH code has been fixed.
- starting both engines with ground bleed air is now possible.