Major Description
1. when adding a new process group to the canvas, in the create PG view where one should give the name of the process group, add a drop down menu to select the parameter context to associate with the process group. It would default to the parameter context associated to the parent process group (if there is one specified and if the user has the permissions)
2. in the configuration view of a process group, add a dedicated tab for parameter context to have dedicated handling. In addition to the dropdown menu for selecting a parameter context, add a checkbox to recursively apply the change. This checkbox would only be used when clicking "Apply", it would not be persisted. If checked, it means that the parameter context will be applied to the process group as well to all the embedded process groups (recursively) if and only if the user has the proper permissions on all process groups.
