Group consecutive documents in timeline

If many documents are uploaded to a ticket, change, or problem within a certain timeframe (1 hour?), show them together in a gallery format. If another type of item is added between uploads, create a new gallery. To avoid formatting issues, non-images will need a placeholder image as currently nothing is displayed for those items.

This could be a preference setting for users. Willing to work on PR if there is interest in this.

A very rough example (needs formatting fixed for oversized images, and show the document icon somewhere):