I tested out all the admin functionality and it looks great. I ran into the following issues that I have resolved in the attached code.

* Getting a PHP warning about the argument to foreach when there were no files uploaded
* Confirmation message for an uploaded file contained the name of the temp file (which could contain a suffix if uploading the same file more than once)
* No validation for having to select at least one value when trying to delete files (which ended up causing some errors down the road)