SC and PHP: change to supercontainer.php file

[Steve Hearn]

We've found that when SC moves the file from its storage location to the temp folder on the web server (different machines in our case) an extra character is added to the filename. PHP tries to move the file for transfer to the client's browser but the move/rename command fails because the filename is incorrect (doesn't have the extra character). Placing a Trim around around the commands in line 160 seems to have fixed it.