2.550

This is an automatically generated changelog draft for Jenkins weekly releases.
See https://www.jenkins.io/changelog/2.550/ for the official changelog for this release.

🚀 New features and improvements

• Refine dialog component (#26033) @janfaracik
• Refine the 'New Item' screen (#26031) @janfaracik
• Hide last repeatable delete button with minimum > 0 (#26277) @mawinter69
• Make time zone list expandable in help (#26241) @AmoghParmar

🐛 Bug fixes

• Fix "Zeno’s paradox" like logic of the progress calculation. (#26235) @dukhlov
• Avoid using string replace when copying a cloud (#26260) @mawinter69
• Use client-side redirects in admin monitors for Chrome (#26207) @daniel-beck
• Do not compute CSP header if disabled (#26255) @daniel-beck

👷 Changes for plugin developers

• Refine dialog component (#26033) @janfaracik

👻 Maintenance

• Replace dependency on jenkins.io with a local mock server for testing (#26258) @adhamahmad

📦 Dependency updates

• Bump tar from 7.4.3 to 7.5.7 (#26276) @dependabot[bot]

All contributors: @AmoghParmar, @adhamahmad, @daniel-beck, @dependabot[bot], @dukhlov, @janfaracik, @jenkins-release-bot, @lemeurherve, @mawinter69, @renovate[bot], dependabot[bot] and renovate[bot]