* Frontend: fixed missing login dialog when visiting root page.
version-0.22.0
What's new (since 0.21.x):
* Added `{GET,PUT} /system` API calls.
* Added `GET /backup/endpoints` API call.
* Added `PUT /ports` API call.
* Added `PUT /device` API call.
* Added `backup` device flag support.
* Adjusted various API calls to new qToggle API specs.
* Added full support for backup/restore (both server and frontend).
* Core/API: fixed wrong error code returned on invalid attribute values.
* Frontend: fixed some back button navigation issues on mobile.
* Many minor fixes.
version-0.22.0-beta.4