Manual customization of the 'Channel' custom field

Currently it is not possible to change tickets (from imported projects) into customer request. It is now possible to manually change the Request Type; but it is currently not possible to change the Channel to Portal. By default; all tickets created in JIRA are not viewable in the Customer Portal.

I believe that users should be given the ability to change the Channel from JIRA to Portal (and vice versa). While it is possible for the agent to raise a request via portal view in behalf of the customer; the same cannot be said if the project are imported into JIRA.

The Channel custom field should be made editable so that users can transition and change all the tickets to Portal. When the ticket is assigned to a customer; the customer will be able to see it in their portal.