Complete audit & correction of how client side functions invoke server side functions based on best practice guidance

[tombisho]

A review is currently underway that is looking to prescribe best practice for calling server side functions. This includes issues such as whether:

1. the whole command is just passed as a string or a call object
2. parts of the call need to be passed as symbols (and the implications on the server side of using eval etc.)
3. there are differences between aggregate and assign