Stable merge

Update PX4 Firmware metadata Sat Mar 10 23:37:05 EST 2018

Clear resume mission index

Convex survey support

Firmware Upgrade Fixes

For much better performance

Add support for VTOL transition from joystick buttons

These are defined in PlanManager. Having them here as well causes lost
signaling.

Survey initial altitude not causing correct grid recalc

Stable merge

Switch Windows to Qt 5.9.4

Set focus on button and checkbox click

Stable merge

This forces a commit on any uncommitted TextFields

Add ParameterManagerDebugCacheFailureLog support

Used to debug cache CRC misses.

Custom, single firmware upgrades were fixed to "stable", even if the user selected "custom".
The code, when selecting the firmware type was using the combo box model index instead of the actual type defined by the list model.

Allow setting MAVLINK dialect in user_config.pri

Flight Widget

Allow plugins to define a left placement for its custom flight widget.
When placed on the left, the action tool strip is placed on the right side.

Update localization strings [ci skip]

added additional packages needed to build QGC