* fixed run-elevated error and powerpreview settings not working
* removed EXTENDED_STARTUPINFO_PRESENT flag
* removed test string
* Update Microsoft.PowerToys.Settings.UnitTest.csproj
* Rename PowerLauncher.cs to PowerLauncherViewModelTest.cs
* Deprecate ATL based IPC wrapper library
* C# projects now use named pipe server implementations from two_way_pipe_message
through the interop C++/Cli library.
* Added Unit testing to interop library
* format_sources: exclude 3rd party sources
* format common project
* format leftovers in runner & settings projects
* move source formatting-related files according to #939