Changelog for 2.222.4

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Prevent a form validation "404 Not Found" error when the resource root URL configuration points at a previously configured resource root URL (regression in 2.222.1). (issue 62133)
Upgrade to Remoting 4.2.1 to fix an issue with large payloads over WebSockets. Requires a matching agent.jar with remoting 4.2.1 or later. (issue 61409 , pull 4601, pull 4596, Remoting 4.2.1 changelog, WebSockets blog post, JEP-222)
Update Groovy Init hooks to run after all job configurations are adapted. (issue 61694)
Fix spacing between error messages in Setup Wizard (regression in 2.222.1). (issue 61660)
Fix input field hints for tools like the git plugin that search the PATH for their executable (regression in 2.222.1). (issue 61711)
Remove grey bar below the textarea form elements for read only users. (issue 61284)
Distinguish between defined (*****) and undefined (N/A) password on read-only configuration forms for users with Overall/SystemRead or Item/ExtendedRead permissions. (issue 61812)
Users with extended read permission now get a more read-only looking UI. (issue 61202 , pull 4479, issue 61321 , pull 4541)