Ensured that the namespace for generated code is the same as the script by default

[RoyTheunissen]

Previously when creating a new collection, the Namespace field that the collection applies to its generated scripts would default to the namespace prefix, instead of using the same namespace as the collection script itself. Given that by default it places the generated script in the same folder as the as the collection itself, it should also use the same namespace by default, with the option to set it to something else if you prefer.