Mavlink protocol version negotiation fixes

Fix combo box height

Remove old code and fix typo

ArduCopter Heli: Support 8 servos

Replace usage of QMessageBox with a QML window.

Initial support for PX4 Rover

Moved the preflight checklist to a proper, modal dialog.

Fix height

Support 8 servos

Firmware Flash: Fix crash caused by NULL vehicle

Instead of trying to keep a vehicle type within the FirmwarePlugin instance, pass the vehicle to the function so it can query the type that way.

Fix crash caused by NULL vehicle

Crash and typo fixes

Handle text to speech locale

Remove unnecessary AudioOutput dependencies.

Fix incorrect reference to vehicle causing crash

Fix typo

Bugfix: QGC crashes when Taisync is attached for the first time

User hardware video decoding on Android

ArduPilot: Fix parameter write broken by non-ArduPilot component changes

Branding Logo Fixes

Handles branding logo visibility according to available space.

Fix parameter write broken by non-ArduPilot component changes

Disambiguate showComponentDialog

Parameter meta data cleanup

Switch to clearer property usage

Switch to clearer property usage

Tweaking toolstrip layout

Multiple vehicle types