[Roster] Confirmation after invite has been sent

[jcamou]

Currently, once you send a manual invite you get redirected to the roster page with no indication of whether it was successful or not. Can we add either a div that shows up when the invite has been sent that just confirms the action - either on the user invite page or once they get redirected back to the roster.

[jamesfid]

@jcamou We don't want to add a div, we'd want a Totem Message.