improve sources preview

[peterstadler]

This is a meta issue for the list view of sources, i.e. fixing /updating the individual preview as well as the list filters:

• [x] icon
• [x] source type, e.g. "print", "manuscript"
• [ ] shelf mark and archive/library for manuscripts
• [ ] creation (some information about time) for manuscripts
• [ ] remove <identifier type="VN"> and <availability> from publication statement preview (see e.g. A222809)
• [ ] add chronology filter
• [x] add pubPlace filter
• [ ] add publisher filter