Resolve "Upgrade single-sign-on to version that uses Kratos"

Closes #1071 (closed)

Addresses #1061 (closed)

Before we merge this:

1. The loginpanel branch in SSO should be merged (single-sign-on!68 (merged))
2. We should make a new tagged release in SSO (0.5.0)
3. We should use that tag in this MR.