Show errors from preset load failures

Fix waypoint linkage to first item

Add missing hideDialog call

Remove close dialog from click handlers

added function to FlightView to show the checklist if switching views from a view other than FlightView and if checklist should be shown

Drive Plan view ROI support from firmware capability bits

Avoid arrow positioning with take item

Only check latest stable firmware one time

Cleanup download object on error

Fix typo

Track trace mode in polygon so we can use it to exit wizard mode

timer.start() and timer.stop() were breaking the 'running' binding of
the timer

Fix current item updating after delete

Not setting _isIncomplete correctly was causing crash

Fix Plan insert Takeoff/Land for correct enable state and insert into correct place. 

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

Plan: Make PX4 VTOL takeoff work like fixed wing

Makes more sense for it to be in VideoStreamer as it takes care of managing
the video streams.

MSVC warns about not identified pragmas
Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Change follow to work above home altitude only

mavlink as submodule contains more warnings than particles in the universe.
This results in a terrible experience for developers, since it makes harder to find
real warning messages for QGC.
Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Fix matroskamux stream start (workaround for https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/issues/449)