Change to log file extension handling

Small screen, fall back to font based sizing

RTK Indicator updates

CameraSection: Fixup unit test to new NaN usage

Fixes for relative altitude signalling

Don't drop point-size on Linux

Fix coloring of QGCComboBox dropdowns

Updating MAVLink camera/video commands.

New V3 format for mission items

Moves all params into param array instead of using GeoCoordinate for
param 5/6/7

Allow plugins to create (native) root window

Flight time estimate for hover and capture

Flight time calculation for ascent/descent

Allow renaming a tile set

Add some extra information to prearm failure display

Hack workaround to 5.9 android FileDialog Qt bug

https://bugreports.qt.io/browse/QTBUG-61424

Bump up Xcode to see if the Mac installer build runs properly.

Polygon Editing: Use better z-ordering to handle cases where drag/split overlay each o…

This gives drag clicks precedence over splitting.

[WIP] First stab at GPS RTK indicator

Fix for Safety setup backwards compatability on Sub-3.4