+* The `StickyToolbarView` has been replaced by the `StickyPanelView` with a child `ToolbarView` (see [ckeditor/ckeditor5-ui#297](https://github.com/ckeditor/ckeditor5-ui/issues/297)). ([e4f591f](https://github.com/ckeditor/ckeditor5-editor-classic/commit/e4f591f))
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