Properly manage "resurrecting" team members

[caarmen]

If you delete a team member, and you later try to add a team member with the same name, there is an error "this member already exists."

Possible ways to manage this:

• When deleting a team member "John Doe", rename the deleted member to "John Doe (deleted)"
• When adding "John Doe" when there exists a deleted "John Doe", prompt the user: "Is John Doe back again?". If yes, just undelete this member. If no, force the user to choose a different name for the new John Doe.

[RamatjyotSingh]

Hi @caarmen, I have opened PR #77 which should close this issue. Can you please review it when you have time? It was a single line fix. Thanks!