v0.19.0: Merge pull request #1881 from material-components:release-0.19.0

Added

• button
  • Sass theming mixins added
• base-element
  • BaseElement.click() forwards focus to BaseElement.mdcRoot
• elevation-overlay
  • implemented elevation overlay styles
• fab
  • reducedTouchTarget reduces the touch target on mini fab
• form-element
  • FormElement.click() forwards focus to FormElement.formElement
• list
  • export for ActionDetail
  • export for SelectedDetail
• menu
  • --mdc-menu-max-height to set max height on menu
• tab
  • export for TabInteractionEventDetail
  • fix race condition on safari

Changed

• fab
  • BREAKING:VISUAL default touch target increased on mini fab by 8px.
• button
  • Separate classMap into its own method

Fixed

• Unpkg integration should properly dedupe after removing file extensions from imports
• button
  • outline color should default to on-surface with 12% opacity
  • disabled outline color should default to on-surface with 12% opacity
• fab
  • BREAKING:VISUAL vertical alignment is now all inline and up to spec.
• icon-button-toggle
  • removed aria-hidden="true" from button
• linear-progress
  • Fixed performance issues with indeterminate set on modern browsers
  • Animations no longer run when indicator has been closed.
• menu
  • Fixed a wrong export of DefaultFocusState from mwc-menu.ts