QGCFileDialog remove separate mobile fileExtension properties

Clean up references to MainRootWindow globals

Split into Views and Tools

supportedMissionCommands is vehicle class sensitive

Better handling of vehicle change state transitions

Rework handling of fw/vehicle type with respect to conflicts with actual vehicle types.

ToolStrip rearchitecture for encapsulation and customization

Rework Fly View into separate layers which can be customized at each layer.

Major rework to support terrain profile display and terrain collision reporting

Propagate opacity and interactive properties to mission items
Set opacity to 0.5 for items that are not part of the current
edit view

Visual tweaks for mission items

Plan: Add support for takeoff item required

Put back ToolStrip titles which were mysteriously removed

Drive Plan view ROI support from firmware capability bits

Fix current item updating after delete

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

Persist MissisonItemStatus visibility

MissionItemStatus: Show seq nums, clickable selection

Add support for incomplete segment visuals

Remove Fly/Plan from toolstrips

Make Toolstrip flickable, fix maxHeight, fix bunch of margins

Show MapScale at correct times

Active ROI indication in Plan Map items

Cancel ROI support plus many big fixes

More work on contextual Plan tools

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

Support for new TakeoffMissionItem and Takeoff Tool 

Fix Create Plan vertical spacing problem

Integrate Create Plan overlay in File DropPanel

Fix save state checks. Show overlay on New.

Wizard Mode for Create Plan

New Create Plan support

Fix centerViewport calculation

Fix SplitSegment insertion

Remove all case missing current index notification