[feature request] Indicator it the bookmark list that a page has an HTML Snapshot

[radiant-tangent]

Can we have a way to display up front in the bookmark list whether or not a bookmark has assets? I would like it specifically for snapshots, but indicating any assets would also be reasonable. As a user I would like to be able to see which bookmarks have an HTML snapshot. I don't have settings enabled to generate screenshots for every bookmark. My current workflow, for pages I want to capture, is to click the view menu and generate the snapshot and then close that and go to the edit screen to add a "page_captured" tag. This works but it is clunky.

[lilygthb]

this could benefit from implementing #869 : one could apply a tag that indicates links that needs to have a snapshot and create them in bulk. This could also benefit management of imported collection from Pinboard etc, helping to "complete" the archive.