wrap pretty much all freemarker variables (i.e the data) in encodeHTML(data..). this...

wrap pretty much all freemarker variables (i.e the data) in encodeHTML(data..). this fixes tons of bugs in the admin, like when stuff dissappeats after quotes, etc.. also add query_text, query_field, etc.. to the delete request URL so that after deleting a media item, you come back to the same place on your list.. oh yeah, there also was a missing data. for query_media_folder