SendGrid click tracking is enabled by default with no way of disabling

[idbates]

By default SendGrid enables click tracking which isn't always desirable for all applications. To disable its necessary to call SendGridMessage.SetClickTracking(false, false). The SendGridMessage is created locally within SendGridSender.SendResponseAsync.

For our application disabling click tracking will mean inheriting and overriding SendGridSender.SendResponseAsync.