More work getting _addMissionSetting right

Update unit test for no auto takeoff item add

Fix handling of _addMissionSettings

Support for new TakeoffMissionItem and Takeoff Tool 

Comment out noisy warning

Simplify mission item list 2

Fix crash caused by clear method not resetting internals correctly

Fix crash caused by clear method not resetting internals correctly

Polygon/Line tool name changes

Instrument PageView: Palette based coloring for gear icon

Plan: Create Plan

FW Landing Pattern: Warn about glide slope altitudes

PolyLine -> Polyline

Warn about glide slope altitudes

Polygon/Line tool name changes

Fixed unused variable

Fix Create Plan vertical spacing problem

Integrate Create Plan overlay in File DropPanel

Add simulateClick support

SectionHeader no longer set width automatically

Mavlink Inspector: Dynamic sizing of message buttons

Dynamic sizing of message buttons

Plan mission item editor: Delete icon and Command Picker ui

Delete icon and Command Picker ui

Param progress bar and other stuff

Separate progress bar handling for initial load, write and read batching

Fix display of param load errors

Revert QGuiApplication->QApplication change since it breaks message dialogs.

Check for pending param writes on app close

Plan: Incomplete visuals, Polygon/line toolbar

New centered PlanEditToolbar

Better incomplete data visuals

Fix inverted close policy logic.