use system proxy settings when fetching maps

 * appveyor too slow

* enable TCPLinkTest
* enable FileManagerTest

Add XML for ArduSub parameters

Fix double Reset button

* [WIP] deploy release and daily build pdbs to s3

* First pass at windows symbol generation for #2680

* Kill the conflicted compiler flag warning

* Tweaks to windows compiler flags for release builds, more qt-ish release symbols and ltcg

* Deploy tagged release symbols and CI builds to different S3 folders

* Support LTCG on iOS

* Just turn off ltcg for iOS if it is going to be such a pain

Flight display: Fix visuals, hide states that should not be operated, make sliders safer and allow to reduce altitude when in air

PX4 Guided Mode

Firmware plugin: Sequence guided mode correctly, widen modes in which guided support should be available

Cal mag

More size adjustments.