milkdrop not responsive at all on macOS

Hi. This is a great theme, I appreciate your work!

On the latest Spotify version on macOS, the milkdrop visuals are not responsive at all. Is this because I'm on an unsupported version, or because I'm on macOS?

Thanks,
Avi Wadhwa

Start by reproducing the milkdrop responsiveness problem with the latest Spotify version on macOS, then trace the theme's milkdrop visual styles and entry points. The issue does not name files or tests; done means determining whether the failure is caused by the Spotify version or macOS and restoring responsive visuals if the theme supports that environment.

Written by the indexing model from the issue text.