Add thumbnail to Browse

[alawvt]

Is your feature request related to a problem? Please describe.
In DSpace 7 thumbnails do not appear in Browse view.

Describe the solution you'd like
Please add the thumbnail to List view. This will create a view comparable to that in DSpace 6 XMLUI when webui.browse.thumbnail.show is configured in https://wiki.lyrasis.org/display/DSDOC6x/Configuration+Reference#ConfigurationReference-WEBUserInterfaceConfigurations.

We like the current XMLUI search and browse lists because they combine thumbnail, title, author, year, search snippet or abstract snippet in a list that is easy to scroll through. We use then all the time to check and administer the repository, for example, using the thumbnail to confirm there is a file and that the thumbnail is correct, checking complete title, author, date, and indexing. Users enjoy images.

Describe alternatives or workarounds you've considered

Additional context
Add any other context or screenshots about the feature request here.

[tdonohue]

Similar to #1744, this one also appears to be implemented by @mspalti in #1780. Linking this up to that PR and assigning to @mspalti

[alawvt]

As well implemented in DSpace 7.4 on DSpace 7 Demo,