DAR-2750 changed height of modal's header and footer, added padding
DAR-2750 changed font size of modal title
DAR-2750 changed modal's close button
DAR-2750 added shadow to modal
DAR-2750 last changes in padding and including box-sizing for header, section and footer
DAR-2750 changed height in JS for IE
Merge branch 'DAR-2750' into DAR-2626