Use new FactValueSlider control for simple mission item altitudes

USBBoardInfo.json: add Omnibus F4 SD

Fixed checked state logic 

Support for low battery state (and remaining time)

This reverts commit 3a18878b.

maps: Statkart update to v4

Perfect. Thanks!

Skip host lookup on Android

UDP Fixes

Work around a new Windows issue where the call to list the local network interfaces takes for freaking ever to return, blocking the UDP thread altogether.

Fix bluerobotics/qgroundcontrol#164
Signed-off-by: Patrick J.P <patrickelectric@gmail.com>

Don't signal if coordinate is the same

Upstream stable merge

Don't bother testing the reason for exiting the wait condition. If there is nothing to do, it will exit any way.

Added clickable link and ScrollView to CustomCommandWidget

Fix OpenSSL for Windows

Guard terrain tile from reading beyond the bytearray end

Separate terrain from tile maps within cached tile request system.