Interface: Scene selection

[renemarc]

As a user, I want to be able to select global overriding scenes so that the apartment's lighting and devices matches the desired mood.

Acceptance criteria

• It's done when I can select a Daylight scene and have lights turn on to noon-whiteness.
• It's done when I can select a Gaming scene and have the place feel geeky.
• It's done when I can select a Romantic scene and make the place quiet and inviting.
• It's done when I can select a Movie scene and make the place quiet and comfy.
• It's done when I can return to default automations when a scene is disabled.