Digital signage slides: Show in-app

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No description provided.

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Collection "digisign_images" contains a list of slides to be shown. Each document is constructed mostly-similarly to the media references on organizations, content, people, etc.

The only things to ever be presented to the end-user are the referred image and potentially name_text (but it's currently an empty string).

digisign_image.sort_order is a non-nullable integer that should control sorting of the slides.

Download these assets by URL reference. Do not depend on Firebase storage.

Conference GPN22 has example data populated. Additional data can be added if needed.

There is not yet a menu mechanism to get to this content (I'll work on that tomorrow).

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Menu-item function "digisign_images" has been reserved to engage this functionality.

It is not yet in use anywhere, but will appear the next time GPN22 is published. I'm intentionally waiting for confirmation that the apps gracefully handle menu items with unknown function references.