Cannot add a job that doesn't take arguments through the web-ui.

[fake-name]

Basically, I have a bunch of custom jobs that don't take arguments. I've therefore omitted the 'arguments' section from the meta_info() function.

This seems to allow the jobs to be executed fine, but the web-ui doesn't allow you to add the job due to an error:

Basically, it seems the interface is blindly assuming that these fields are present.

It seems like either the value of meta_info should be validated before shipping to the web-client, or it should handle missing parameters in a way that doesn't render the web-interface non-usable.