Removed redundant &display_mode=full

I believe this was overriding the display_mode passed into the function? _Or is it always full?_

Either way, Flagged by **ZBBLOCK** as a Nesting attack (QUN-025) - http://www.spambotsecurity.com/zbblock.php

I think this also needs to be done in **concrete/js/ccm.app.js** but I am not familiar enough with the build process?