FlightGear - Flight Simulator FGAddon

Add slat/flap control and slat sound for all CRJ900 variants.

Add flaps stop sound.

Fixed cockpit panel views for CRJ900 variants (was copied from 700).

Flaps sound minor adjustment.

Changed EICAS slats/flaps indicator.

Minor adjustment to slats/flaps controller.

Add slat/flap to flight recorder. Needs testing.

Add switch for slats to all CRJ*-set.xml files. Not sure, which models have no slats (if any).

Removed 2D panel.

Add missing file

From: Henning Stahlke <github@...>