When a user posts a link in chat Mattermost helpfully expands the link to provide additional content, including the site title, a short summary, and an image. Individual users can collapse the image (if one exists), but not the entire preview. As only the user who posts the link can delete the preview, it would be nice if any user could collapse the preview in its entirety once they’re seen the preview.
Red area: currently collapsable area
Purple area: ideal collapsable area