Bug, feature request, or proposal:
Bug
What is the expected behavior?
When a checkbox is selected it should display a rounded shadow around the component.
See
https://material.io/guidelines/components/selection-controls.html#selection-controls-radio-button
https://material.angularjs.org/latest/demo/checkbox
What is the current behavior?
When you select it by clicking it, it works fine, but when navigating using Tab (keyboard navigation) it doesn't show any sign of being fucused.
What are the steps to reproduce?
Just navigate using Tab between the two checkbox provided below
http://plnkr.co/edit/fruZ4obuY9GzVuYDEKQG