Changes:

• Fix: New brand dialog will now only appear once after the dashboard has been loaded.
• Introducing Proton's refreshed look.
• Display error message if user presses on "Create Account" and page is not reachable via login window.

Depends on D13349.

Connected to various places in the world, ran speed tests, and verified that IP has changed.

Signed-off-by: Gavin Zhao <gavinzhaojw@protonmail.com>