This view allows you to test a Script (Python) instance.
If a Script has no parameters, when the "Test" tab is visited the return value of the script will be presented in the manage_main frame.
        However, if a Script instance has parameters, a form
        will be presented with fields for "Parameter" and "Value",
        changeable on a per-parameter basis.  These accept string
        values.  The Run Script button runs the script after the
        Parameter and Value fields have been filled in, and
        returns the results in the manage_main frame.