v19.0.0

MAJOR BREAKING CHANGES

• ViewCollection no longer has the locale property.
• The ViewCollection#constructor() no longer accepts the locale parameter.
• LabeledView component was renamed to LabeledFieldView. Also, its instance of a labeled component's view is available through LabeledFieldView#fieldView. It replaced the LabeledView#view.

MINOR BREAKING CHANGES

• The DropdownView#focusTracker property has been removed as it served no purpose.

Features

• Allowed defining initial items of ViewCollection and BodyCollection in the constructor. See ckeditor/ckeditor5#6319. (6cd15de)

  The View#createCollection() method now also accepts an iterator of views.

• Introduce FormHeaderView UI component. Closes ckeditor/ckeditor5#6109. (eb1ce18)

• The BlockToolbar should group items when there is no place to show them all. Closes ckeditor/ckeditor5#6449. Closes ckeditor/ckeditor5#6575. Closes ckeditor/ckeditor5#6570. (fcd9c4e)

  Improved ToolbarView#maxWidth and items grouping when the toolbar is invisible.

Bug fixes

• Call ResizeObserver.destroy() when destroying block toolbar. (59449d2)

Other changes

• Removed the obsolete DropdownView#focusTracker. Closes ckeditor/ckeditor5#6548. (ac750c7)
• Rename LabeledView component to LabeledFieldView. See ckeditor/ckeditor5#6110. (5a7aca7)
• Updated translations. (2a391d6)