Metro UI CSS v3 (beta 5)

• fix triggering for input when clear button clicked
• fix panel heading style bug
• New widget Validator
• fix dropdown.js pull-request 768
• fix full size for modern input
• carousel: Added duration based timeout to next/prev event
• upd tabcontrol docs
• fix drop shadow for menu for ie9
• fix appbar dropdown toggle for ie
• upd treeview for value for check and radio