Dark mode compatibility

[chaban-mb]

Several scripts, though I don't use all, don't work well with prefers-color-scheme: dark.

Testing done by enabling dark mode in Chrome Dev Tools and Stylus with musicbrainz-dark.user.css

Examples

BatchAddRecordingAliases.user.js

CopyRecordingsFromRelease.user.js

References

• https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules/@media/prefers-color-scheme
• https://web.dev/articles/prefers-color-scheme

[YoGo9]

Please test before I merge.

Made some other changes for BatchAddRecordingAliases.user.js that it should not take up so much real estate and is now a button that expands.

Please also test CopyRecordingsFromRelease.user.js