VIsual tweaks

Added configurable value grid to toolbar

Re-architect toolbar for better customization capabilities. Also use less real estate.

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

More FlyView encasulation. Make QGCPipOverlay completely self contained

More work on encapsulation in Fly View

App messages now use simple modal message dialogs. Vehicle messages continue to use non-modal popup.

New QGCPopupDialog mechanism

QGCPopupDialog support

Add note about ADSB server settings

Temporary use setting for using CONDITION_GATE in Patterns

Plan: Add support for takeoff item required

Programmatic switch to SetupView leaves two buttons selected

Allow telemetry settings section to hide

added function to FlightView to show the checklist if switching views from a view other than FlightView and if checklist should be shown

Tweak chart colors

Android OpenSSL support

Remove unused code

Support Keep map centered on vehicle

Prevent view switching apis support a stack

View switch prevention support

Change to use combo