As an admin I want to be able to disable the invitation e-mails from Service Desk

Problem Definition

Admins would like to prevent the following customer invitation e-mails going out when adding customers to an organization in Service Desk:

Hi,

<User> has invited you to the <Service Desk Project> portal!
Visit the portal to raise requests and get help.

Suggested Solution

Add the 'Service Desk invitation' notification to the Customer notifications that admins can edit/disable.

Why this is important

Some admins like to populate organizations ahead of time and don't necessarily want those e-mail notifications going out.