Use different UI for App/Vehicle messaging

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

Stable merge

Hack out missing method

Refactor instrument value controls

Refactor instrument value controls

add emergency stop as joystick button action

Add support for multi-press joystick buttons

Add support for multi-press joystick buttons

Stable merge

Fix PX4 Flow image provider

Always generate AppSettings::savePath at runtime for mobile builds

Fix PX4 Flow image provider

Reset the checklist when the activeVehicle changes

Fix QGCPopupDialog automatic flickable parenting

Fix QGCPopupDialog automatic flickable parenting

Set RC To Param support

Set RC To Param support

Use new QGCPopupDialog mechanism

New QGCPopupDialog mechanism

Change default metric system based on user locale

Tweaks to Popup visuals

Tweaks to Popup visuals

Value range visual change support

Update value visuals to support value ranges

Initial support for value ranges

Value edit dialog

New value editing dialogs

QGCPopupDialog support

Instrument Values: Icon picker support

Icon picker support

Icon support for instrument values

Add missing include

Generic icon set for values display

Icon support for values display

Add support for ScreenTools.defaultFontDescent

Always generate AppSettings::savePath at runtime for mobile builds