Enlarges drop target for ddrerank to provide better feedback about possible placement of dragged item
Fixes regression bug with jquery yuicalendarcontrol which can fail if yui not already loaded on that page
Creates new jQuery/Bootstrap3 filemanagercontrol; requires moving SimpleAjaxUploader into /external subfolder since we now have 2 versions, the original and our yui module conversion; also applies some tweaks to other framework filemangercontrol's