Fixed "Media - Drawing" when play or preview

This issue is related with deprecated $.browser of jquery.

http://www.xerte.org.uk/index.php?option=com_kunena&view=topic&catid=4&id=778&Itemid=207&lang=en
Fix accordion header icon

http://i.imgur.com/JeCaaOW.png
to 
http://i.imgur.com/5uvkvu3.png
Merge pull request #100 from hellson92/develop

Fixed "Media - Drawing" when play or preview