Section editor testing

Related to #251 (closed) Hi Yannis, we tested the Section Editor role. Looks good! A couple of things below:

• the section editor did not receive an e-mail notification when the article was assigned to her.
• It would be good to add in the Manage team box both Editor and section editor roles - see screenshot 1
• We'd like to have the names of the section editor and Editor displayed in the dashboard - see screenshot 2