v4.0.0-beta.2

What's new

• Export ProseMirror model and view. #8032 by @jacksleight
• Add actions to assign roles and groups to users from the users listing. #8013 by @jesseleite

What's improved

• Bring back Bard's Sticky Toolbar, but only for top-level fields. #8022 by @jackmcdade
• Improve column resizing UI in Bard table. #8025 by @o1y

What's fixed

• UI fixes. #8033 by @jackmcdade
• Fix date field issues. #8036 by @jasonvarga
• Revise asset folder creation modals. #8034 by @jasonvarga
• Fix losing super when editing self user in CP. #8012 by @jesseleite
• Fix relationship selector search autofocus. #8021 by @o1y
• Text field size consistency. #8028 by @jackmcdade
• Fix Bard Toolbar position when in fullscreen mode. #8024 by @o1y
• Fix Reference Error when using bard toolbar link button. #8019 by @jasonvarga