2.281

Disclaimer: This is an automatically generated changelog draft for Jenkins weekly releases.
See https://jenkins.io/changelog/ for the official changelogs.
For changelog.yaml drafts see GitHub action artifacts attached to release commits.

🚀 New features and improvements

• removed some less workarounds for IE<11 (#5280) @StefanSpieker
• Improve button focus states and customizability (#5291) @fqueiruga
• Better @DataBoundConstructor hygiene for ParameterDefinition’s (#5275) @jglick
• Revert "Clean up VirtualFile after adding base implementation (#5212)" (#5298) @daniel-beck

🐛 Bug fixes

• Revert symbol-annotation bump (#5293) @jglick

👷 Changes for plugin developers

• Revert symbol-annotation bump (#5293) @jglick
• Better @DataBoundConstructor hygiene for ParameterDefinition’s (#5275) @jglick

All contributors: @StefanSpieker, @daniel-beck, @fqueiruga, and @jglick