Bugfix: Studio Validation of External URLs

Studio's validation of URLs in "External Link" documents in strict mode (url-validator.strict=true) could fail on special characters, like square brackets, regardless of their encoding in the URL. This is now fixed.

(CMS-30697)

Fix Potential Workflow Server Unresponsiveness Caused by CleanInTranslation Job

Fixed a bug in the CleanInTranslation scheduled background job of the Workflow Server that could render the server unresponsive when active translation workflows referenced large amounts of content. As a side effect, the Studio Server could also become unresponsive due to blocked Tomcat request threads waiting on the Workflow Server.

(CMS-30612)