Something changed between the time https://github.com/jenkinsci/jenkins/pull/6806 was reviewed and merged and 2.360 was released, because the current implemenation doesn't match what the PR shows and what we reviewed.

See the attachment for the current design.

Browsertools complains about the following when clicking the checkbox to select all plugins:

index.js:49 Uncaught TypeError: Cannot read properties of null (reading 'classList')
    at updateIcon (index.js:49:25)
    at HTMLButtonElement.<anonymous> (index.js:33:5)
updateIcon @ index.js:49
(anonymous) @ index.js:33

Do you mind taking a look janfaracik?