On a recent customer call, there was frustration expressed around the inability to filter participants down to the ones who were not assigned to a group
As a result, they cannot quickly assign users to groups in bulk and must manually select each unassigned participant one at a time.
This creates a very manual process, and for customers who have a large amount of participants, this just is not feasible
Let's add an option to the group filter dropdown to account for these unassigned participants, we can label it "No group assigned" (or something similar)