Library: Display RAW previews and the number of actual files in Originals

[lastzero]

As a user who enjoys browsing his/her files in Library > Originals, I would like to see a preview (JPEG thumbnail) for RAW files and the actual number of original files in the navigation so I can compare them better.

[rabotond]

I tested it and seems to work fine. Samsung S21 raw footage.

[lastzero]

Thanks for testing!