Mavlink terrain protocol support

Put back ToolStrip titles which were mysteriously removed

Are you sure check on preset delete

Fix altitude mode setting for correct control display

Fix Done Tracing <-> Done PolyFoo in wizard relationship

Drive Plan view ROI support from firmware capability bits

Track trace mode in polygon so we can use it to exit wizard mode

Fix current item updating after delete

Fix Plan insert Takeoff/Land for correct enable state and insert into correct place. 

Plan: Make PX4 VTOL takeoff work like fixed wing

Preset selection in wizard mode

Move label for better fit

Warning text update

Less wordy text

Add localization

Use Map Palette

Persist MissisonItemStatus visibility

MissionItemStatus: Show seq nums, clickable selection

Add support for incomplete segment visuals

Fix command picker visuals

Use consistent "Launch" naming

Remove Fly/Plan from toolstrips

Support move item to previous item position

Make Toolstrip flickable, fix maxHeight, fix bunch of margins

Show MapScale at correct times

Can't hide fly through commands

Active ROI indication in Plan Map items

Cancel ROI support plus many big fixes

Fix show/hide of click to set Launch location

Better wordings for Takeoff item

New user model for Takeoff item

Fix gradient calc

More work on contextual Plan tools

A contextual Land/RTL tool. Better waypoint line calc.

RTL is no longer part of Mission Settings

Fix takeoff item insertion in plan creators

Only show split indicator on mission layer