Add Live Video image to LedLayout preview

[psychowood]

Feature request

What problem does this feature solve?

Showing a screenshot/live preview of the captured video in LedLayout preview would easen a lot positioning non-standard led layouts.

What does the proposed API look like?

It's probably a frontend-only change.

How should this be implemented in your opinion?

Adding a button that changes the background, imposing a static preview taken from the Led Visualization would be enough. Imho there's no need for a continuous Live Preview.

Are you willing to work on this yourself?

I could, time permitting... not in the short term period probably, tho.