* QGCCheckListItem -> PreFlightCheckButton
* CheckList -> PreFlightCheckList

Automated preflight checklist: Initial commit. Note that this requires an autopilot firmware that writes the respective health flags in the SYS_STATUS mavlink message

For much better performance

This forces a commit on any uncommitted TextFields

Create a "Dead Mouse Area" control to eat mouse events underneath desired area. This is to prevent mouse events from leaking through controls underneath the area.
Replace original "NoMouseThroughRectangle" as this is more versatile.
Prevent mouse through events from leaking underneath the Fly View tool strip.

Adding missing qgcView to QGCMapPolygonVisuals instance in SurveyMapVisual.qml

Don't close mobile dialog on file delete

- popup don't work with map
- improve popup visible logic
Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

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

Replacement code to speed up work on the map and fighting mistake 'manual control lost' when connected joystick with armed UAV

Moved "Grid Lines" out of General Options and into the Video Stream Widget
Made a QGC custom Switch element