Remove altitude mode warning which was causing recursion into dialog display and view switch problems

Remove missing support for QGCView fact missing overlays

Tweaks to toolbar visibility

Cherry pick virtual joystick fix from Stable

Added a transmitOnly flag to UDP config. When enabled, the socket receive buffer is set to zero such that no data is ever received. Also updated the MavlinkSettings page such that new config settings respect the setting visibility.

Updated mavlink forwarding implementation to forward all mavlink messages received on all channels onto a single UDP port. A new mavlink forwarding UDP link is created if forwarding is enabled. The mavlink settings page now has a Fact checkbox for enabling forwarding and a fact text field for specifying the host name.

Added mavlink forwarding as an option to UDP connections. Enabling this setting will cause every mavlink packet received by QGC to be forwarded on the link, with the exception of packets originating from said link.

Modified support for multiple first run pages. Added first run for offline vehicle settings.

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