Change feature default values to something that will be identified as "not set". When a flight is created, features with missing values (not set) are not included. Note that all these are persistent, which may create a problem if something changes (different vehicle with large weight difference for instance). As the subsequent use of these are persistent, a question may not be asked because it's already set (the brief only asks for missing or problem values).

# Conflicts:
#	src/MissionManager/ComplexMissionItem.h

Fix TTS deployment on OSX
I'm merging this. If something comes up we can come back and change it.

Make the choice of using a personal key persistent. This will allow to toggle between personal and hardcoded key. Otherwise you would need to clear your personal key each time you want to use the hardcoded one.

Fix combo width sizing

More random corrections around the code

Fix flight mode switch setting

Remove dup gstreamer install

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Plan: Fix additionalTimeDelay calcs

Warn if sending MAV_FRAME_GLOBAL_TERRAIN_ALT

Goto Location uses COMMAND_INT

Vehicle send COMMAND_INT support

Draggable radius adjustment for Orbit

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

QGCMapCircle: Support for dragging to change radius

Mavlink Orbit support

Mavlink update

Structure Scan: Fix lastSequenceNumber calc