Survey item editor: Layout fixes

AppVeyor: Only specify 5.11 so minor version will float to whatever is on AppVeyor

Survey, CorridorScan: Add camera start to transect entry even when taking images throughout…

Only specify 5.11 so minor version will float to whatever is on AppVeyor

Layout fixes

Fix mission item generation

Add camera start to transect entry even when taking images throughout survey area.

Polygon: Support loading from SHP files

Radio setup: Rework ui

UI rework

16 RC channels

Allow window to size to down to as small as you want

PX4 - Simple Flight Mode setup: Support switch highlighting

Switch threshold highlighting support

Support 1 or 2 column layout