[Defender Pro] Defender lockout pages still show DEV branding

Despite the white label features in the Dashboard plugin, there’s still a Defender avatar and a powered by Defender text showing on the lockout pages.

At a minimum those should be removed when the white label feature is turned on but it would be even better if we could customize the lockout pages ourselves. Could be as simple as a few controls for background color, an image/icon to replace the Defender avatar, and some text controls.