GH-989 Popover: Make the ariaRole option private: _ariaRole
GH-989 DatePicker and Autocomplete: change open/close to shownby/hiddenby like Popovers
GH-989 Dropdown: Using the ARIA active descendant directly on elements.
GH-989 Popover: Make the ariaRole option private: _ariaRole
Correct the Carousel file routes for Grunt.