Add possibility to resize album covers

[digimezzo]

Hello sir, I've been using Dopamine (started with 2 then 3) for almost two years and I'm very grateful that you created such a good music player/library. However, I have 420 albums in total (almost 5000 tracks), and navigation is a bit clunky even with the search bar. Here's a image of my library: https://imgur.com/a/NKPMu3u

My suggestion: A slider to adjust the interface size, something I've noticed in other open-source software.

Examples:
Duckstation - https://imgur.com/a/bRiB8VP
GitHub - https://github.com/stenzek/duckstation

Playnite - https://imgur.com/a/cwOpGyR)
Github - https://github.com/JosefNemec/Playnite

I just updated it and I really like the new rounded corners, so thanks in advance for your hard work!

Originally posted by @Nicolas4146 in #323