FIX for Issue 950

In the _file_manager_boot.js.erb file there is a string in the function sanitized_filename_check that didn't have quotes around it when rails rendered the file This caused the javascript to crash and not make it to the Ajax call to finish the loading. Didn't break in rails 10.0.13 but did in 10.0.18.

I tested this for rails 10.0.18 and 10.0.19 and both work with ruby 1.8.7. Ruby 1.9.3 will load the page properly but when the user tries to upload a file, it doesn't get added to the list. This will be handled in issue #966.