FlightGear - Flight Simulator FGAddon

Harrier-GR3: Harrier-GR3-set.xml: made help text more concise.

Harrier-GR3: Nasal/Canopy.nas: improved toggle behaviour.

Used to have to wait until canopy was fully open before it would close.

Harrier-GR3: Nasal/autohover.nas:auto_hover_y_speed_set(): avoid nil in numeric expression.

Not sure how this happens, but have seen it once.

mosquito: fix position of navigator, and adjust fuel cocks to make them still accessible.

Models/Mosquito-FB6.xml
Move navigator leftwards 10cm so shoulder doesn't extend outside fuselage.
Models/cockpit.xml
Move fuel control panel left 12cm so it can still be accessed by pilot.
mosquito-fbVI-set.xml
Override max rotation of pilot view so user can see fuel control panel.

mosquito: mosquito-common.xml: fixed description of q/Q master arm.

mosquito: Nasal/merlin.nas: use failure.copilot_message() so identical messages don't queue up too much.

mosquito: Nasal/failure.nas: fix for handling of failures.

We were looking for controls/flight/aileron-filtered which doesn't exist, so
repair_aircraft() failed to complete.

Also made all writes to sim/messages/copilot go via new fn copilot_message()
which ignores messages that have appeared in the last 10s. This avoids
unnecessary text on screen and also avoids queues building up in
text-to-speech if enabled.

mosquito: added simple tooltips for various cockpit controls.

Also reversed sense of throttle and pitch levers so that mouse movement and
wheel matches direction of levers.

In Models/Instruments/att-gb/attitude.xml, tooltip for artificial horizon
requires new fgdata:Nasal/canvas/tooltip.nas to support multiple properties in
tool-tip printf strings.

AlphaElectro: Improve EPSI570

J3Cub: Prop add version, material bug fix, heating-air fix