How can I sort cards by person they are assigned to in the List View?

To sort cards by “Assigned to” criteria in the List View click Assigned to. Cards will be sorted in alphabetical order. The first click enables sorting in A-Z order. Unassigned cards are shown as well. 

The second click will enable sorting in Z-A order. Unassigned cards are shown right after. 

The third click turns sorting off.