Jenkins - jenkins-2.420

This is an automatically generated changelog draft for Jenkins weekly releases.
See https://www.jenkins.io/changelog/#v2.420 for the official changelog for this release, or https://www.jenkins.io/changelog-old/#v2.420 for releases older than around 7 months.

🚨 Removed

• JENKINS-71514 - Remove eval call in hudson-behavior.js (#8370) @yaroslavafenkin
• Remove the addition of the 'has-help' class from hudson-behaviour.js (#8355) @janfaracik

🚀 New features and improvements

• Move app bar for plugins (#8376) @janfaracik
• Update link design (#8375) @janfaracik
• Display a notice when there are plugins installed or updates available (#8208) @janfaracik
• Update the design of the content blocks (#8363) @janfaracik

🐛 Bug fixes

• JENKINS-71848 - Remove admin monitors popup from /manage/ again (#8388) @daniel-beck
• JENKINS-61452 - Tolerate corrupt Base64 in PlainTextConsoleOutputStream (#8378) @jglick
• JENKINS-71833 - Fix link to job in slow trigger admin monitor (#8387) @daniel-beck

🌐 Localization and translation

• Turkish localization fixes for the job configuration page (#8368) @mustafau

👷 Changes for plugin developers

• Deprecate findAncestor and findAncestorClass (#8357) @janfaracik

All contributors: @Mysterious-Dev, @basil, @daniel-beck, @dependabot, @dependabot[bot], @janfaracik, @jenkins-release-bot, @jglick, @mawinter69, @mustafau, @renovate, @renovate[bot] and @yaroslavafenkin