Thumbnails for chapters

[YanagiSen]

Describe your suggested feature

When there are a lot of chapters（ e.g. 240 chapters in Beelzebub by Ryuhei Tamura）,it would be a pain to find a specific chapter only by the chapter number. A thumbnail for chapters would be a help for finding.

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 or closed issue.
• [X] I have written a short but informative title.
• [X] I have updated the app to version 0.16.5.
• [X] I will fill out all of the requested information in this form.

[AntsyLich]

That's 240 http calls for a single series. No