Fix Create Plan vertical spacing problem

Integrate Create Plan overlay in File DropPanel

Add simulateClick support

SectionHeader no longer set width automatically

Dynamic sizing of message buttons

Delete icon and Command Picker ui

Separate progress bar handling for initial load, write and read batching

Fix display of param load errors

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

Check for pending param writes on app close

New centered PlanEditToolbar

Better incomplete data visuals

Rework Mission Complete dialog for correct Resume Mission on ArduPilkot

Hide pre-arm message when vehicle arms

Add missing flight modes

bug in ParameterEditor removed, double-ckicking on a group button shrank width of rectangle and thus of mouse area to 10

CameraManager: bug in CameraPageWudget.gml, stream variable not defined, also avoids a gray spurios window