1.0.0-beta.55

• Added "Views showcase" to header of view editor form on report page
• Exposed injectStyles() helper
• Added progress view
• Removed Shadow DOM usage in progressbar and re-use progress styles
• Changed preloader to create a container (with Shadow DOM) for its content
• Added styles option for preloader, the same as for Widget/App constructors
• Added lib/preloader.css and dist/discovery-preloader.css to the package