Add a counter for remaining issue to read in reading lists

[morsok]

Describe your suggested feature

Today when opening a reading list you have a counter of the total number of books inside it.

It would be great to have a counter of the number of books yet to read, something like 52/100 if you read 52 books of a 100 books reading list.

Other details

No response

Acknowledgements

• [X] I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open issue.
• [X] I have written a short but informative title.
• [X] I have updated the app to the latest version.
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