BUG: refs #912. Remove "upload a directory" mode link
BUG: refs #912. Remove "upload a directory" mode link

The underlying functionality is kept, but there have been several reports
of bugs related to the html5 directory uploader, so I've hidden the
link to use it until we can straighten them out.

jcfr/Midas,jcfr/Midas,jcfr/Midas,jcfr/Midas,jcfr/Midas,jcfr/Midas