The X-UAV Mini Talon is a V-Tail plane. This commit adds the
new group "Plane V-Tail" together with a svg image for the
new group.

[QmlObjectListModel] fix list insert

Fixes https://github.com/mavlink/qgroundcontrol/issues/6770

Custom Plan Save/Load

Limit pixel density fudge to Android only

Expose root plan keys

Dealing with pixel density on Windows and iOS

Allow a plugin to override iOS build settings.

If APM firmware type is disabled, skip all the firmware uploading

Change Log: Add initial 3.5 entries

Add initial 3.5 entries

Add change log

Add change log

Bring master up to date with Stable 3.4

Terrain fixes

Also cleaning up annoying c++14 warnings.

Fix swapped climb/descent

Fix incorrect qCWarning

Hack fix for terrain crash when new query comes through before old query is complete

Compass Cal: Don't show compass orientations for fixed orientation vehicles.

Plan: Fix defaulting when you "Change Command"

Hack fix for terrain crash when new query comes through before old query is complete

Fix Change Command parameter default setting

Windows: Install new version does not delete AppData from previous install.

Install new version does not delete AppData from previous install.

ArduPilot: ChibiOS flash support for Pixhawk family boards