Some feature requests

Hi! I'm a very happy user of the app and I'd like to tell some features I'd love to see in the app :)

1. Being able to set a white/black app theme appart from the system setting (AFAIK you have to use the system wide dark mode to have it on the app; I'd love to have them separated).

2. More layout options for the "currently reading" tab. I'd LOVE to have one where it's a row of three books, with the progress bar and % over the book cover.

3. A "very small" cover layout option that uses/shows a row of four books.

Thank you for this amazing app!