[Bug] - Required and Optional Tabs do not need to be mutually exl

[superhvarn]

Description

When you try to edit a design review and you set certain users as optional, they will not even show up in the suggestions for required users.

Potential Solution

In the handler for setting a user as required, have some checker for the user to see if they are in the other list

Acceptance Criteria

• The optional users show up in the suggestions for required users
• The event handler is updated to automatically deselect users from optional if you choose them as required.