Visualise team members who hold a champion role

[sorensensig]

Is your feature request related to a problem? Please describe.
With today's team overview, it's tricky to know whether a team has a good coverage of the different types of "champions", e.g., security champions. Given that certain disciplines don't have the capacity to cover all teams by default, it would be helpful both for that discipline and the team itself to know which champions they are lacking and therefore should seek out to attain.