Accessibility enhancements

The “Tag Attribute” should have the aria-expanded state updated when the target is open/closed. For example, and as a quick fix/hack I added the following.

$('.collapseomatic').attr('aria-expanded', 'false')
$('.collapseomatic').on('click', function() {
	if ($(this).hasClass('colomat-close')) {
		$(this).attr('aria-expanded', false)
	} else {
		$(this).attr('aria-expanded', true)
	}
})

https://www.w3.org/WAI/GL/wiki/Using_aria-expanded_to_indicate_the_state_of_a_collapsible_element