Only show split indicator on mission layer

Reduce height of items in combo dropdown

PX4 Flight Mode: Rework to use sizeToContents on combos for flight mode channels

Plan: Takeoff tool and Takeoff item support

More work getting _addMissionSetting right

Reduce height of items in combo dropdown

Reword to use sizeToContents on combos for flight mode channels

Tweak combobox visuals

Remove unused code

Update unit test for no auto takeoff item add

Fix handling of _addMissionSettings

Tweak combobox visuals

Remove unused code

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