UI tweaks

WIP - MAVLink chart as a control. Add any number of charts with any number of series. All individually controlled.

Disable closing app on last window close. This will close
the app on every widget spawned in QML that closes (MessageBox)

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

New Create Plan support

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Remove duplicates from missing parameter reporting

Better flight trajectory point algorithm

Plugin'ized follow me support

Fix unit test bug

Delete qml engine prior to toolbox

Turn on popup errors for mobile builds

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Remove unnecessary AudioOutput dependencies.

New qml base log replay status bar

Automated the generation of language resources into the application
Added all languages that come from Crowdin, even if empty.
Allow dynamic language changes

Fixed places where the font family was not being defined (therefore using the default system font)

Restore QGC to its normal UI layout (buttons on toolbar)

Get rid of QGCView, QGCViewPanel and FactPanel. All messages and dialogs are now handled in the root window.

TODO: Improve the experience