fix Carousel a11y support. fixes #17714
Don't call evt.stopPropagation() on mousedown;
it prevents popups from closing.
Fixes #17808.
fix #17813.
fix extra keydown handler registration, fixes #17825
Pager bidi support, fixes #17754
add the ability to switch off spider animation using animate: false
(fixes #17090)
add aria-controls attr to carousel buttons
fix Accordion child init when added before startup, fixes #17393
ensure item callback is called after transition ends, fixes #17463
fix Slider a11y, fixes #17698