Bug fixes

Drupal 9 compatibilty related fixes.
Config export property for entity annotation.

Fix sorting feature for entities without bundle: #3176741: Cannot sort user entity references except for default id.

New Features & Bug fixes:
Add Light/Dark theme.
Issue #3176747: Add warning message for example classes.
Issue #3170330: Media plugins: enable one plugin still shows the types of other plugins.
Issue #3176645: Restyle the effects plugin group.

Release Candidate 2.

No new functionality. Only bugfixes.

• Fix for reassignment error (Issue #3154930)
• Fix for spawning of a process via Webform. Webform submission handler update. (Issue #3166041)
• Fix for task console runtime exception (Issue #3085780)
• Fix for webform task type redirection issue. (Issue #3174481)