Include image on edit media detail screen for Image asset

A first draft solution is ready for testing on the merge request. The only deviation from the requirements defined in the ticket description is that all media bundles defined by this module have their previews displayed on their subtype editor pages:

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The reason why I left the MR in Draft status is that there are a couple of points to possibly further improve the feature:

1. We could use a Twig template for rendering the markup instead of concatenating raw HTML only. If going this way, then some label above the image could be useful.
2. Decide on which terminology, “preview” or “thumbnail” shall we use for this image. I believe abiding by naming conventions matters.
3. Probably test coverage would be necessary as well.

Also updating IS regarding the changes.

This needs work. It can be simplified using existing checks to see if a media type has our source plugin.

The default acquia_dam_asset_item widget plugin has been extended with an extra render array item of the thumbnail image which is being fetched directly from the remote DAM software.
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(Drupal keeps local copies of thumbnails as managed files only for displaying them on entity lists but not on entity forms.)

I can only test the "DAM - Image" content type since I don't think we have any other kinds of content in our DAM (and I don't have the ability to create/add assets to it), so I can mark this as RTBC for that aspect!

Excellent work! It should be documented somewhere that in order for the thumbnail to appear, you have to move the "Asset Reference" field out from the disabled fields on the Form Display settings for the DAM - Image media type.

Thanks!

We'll look at adding it as default later on. so for now, fixed!

Automatically closed - issue fixed for 2 weeks with no activity.