What happened?

The update spinner appears to have lost most of its contrast in a recent update.

Steps to reproduce

1. Visit the Entries page in the CP.
2. Add a sleep() command to a custom module’s init() method to slow down responses.
3. Switch the Entries source to see the update spinner.

Craft CMS version

5.3.6

PHP version

No response

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions