RoamCode v4.0.44

Fixed

• Say why turning notifications on failed. Every error from the opt-in was discarded and the switch simply
  returned to "off", so a browser that refused to subscribe, or a Node that could not be reached, was
  indistinguishable from a button that does nothing at all — with nothing recorded anywhere to explain it.
  The browser's own message is now shown in Settings, and the same applies to turning them off.

Full changelog: v4.0.43...v4.0.44