Remove unused FlightGear stuff
More work
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Windows build updates
Linux fixes
Fix unit test run directory

Windows build updates

Uninstaller was not waiting to complete before installer started

Driver update

64 bit installer changes

New driver versioning system

Change USB driver detection logic

Always install PX4 Drivers

Switch to mini dump

Install new version does not delete AppData from previous install.

Correctly supports application name and branding changes

* [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

Move the buglist override to as early as possible, include switches for specific rendering backends on windows

- Fixed start menu shortcut delete on uninstall
- Uninstall no longer on start menu