Nightly build

Continuous build 0.6.1-nightly.0dbd6f1 of master at 0dbd6f1.

Take TomLabs.AutoUpdate from nuget.org instead of the submodule

The shared self-update library is now a PackageReference to
TomLabs.AutoUpdate(.Avalonia) 0.3.2 from nuget.org; the lib/TomLabs.AutoUpdate
submodule and its solution entries are gone. Docs no longer ask for
--recurse-submodules.

v0.6.0

What's Changed

• UI overhaul and modernization by @TomasBouda in #1

New Contributors

• @TomasBouda made their first contribution in #1

Full Changelog: v1.0.0...v0.6.0