This feature is now implemented. Please update to the current InfoBurst version.
https://help.infosol.com/support/discussions/forums/19000186807
Hey Ken. Thanks for the feedback and documentation. We will review the feasibility of adding this functionality to the HTML5 user interface. I will update you here as soon as possible.
Ken Wong
On the recipients section it doesn't show if the recipient is a TO or CC like it use to do in the flash version. In additional when a recipient is created as a TO you are unable to change it to CC; you have to delete the entry and re-enter it.