Van11y Accessible Modal Window Aria Versions Save

Fix CSS namespacing generation for close button text and image.

Attribute data-modal-describedby-id: adds aria-describedby=<the value of this attribute> to the dialog tag

• Enhanced demos (& new example)
• Added data-modal-focus-toid attribute (to give focus to an element in modal
• Fix listeners (for Webpack)

If you need to apply hide/show script to <div id="newContent">your modal launcher source</div> do use:

van11yAccessibleModalWindowAria(document.getElementById('newContent'));

Updated documentation

Fix bug when button is composed with an image (or any child), as kindly reported in #2