Add "All Groups" option.
Handle selection of all groups.
Handle selection of all users from All groups item.
Select all the groups.
Add option to toggle between user and group view.
Only use one type of menu.
Enabled or not the group submenu.
Remove group/user display menu.
Remove method displaying group menu.
Fix layout of menu items.
Replace text.
Add separator to menu.
Remove selection of user in group display.
Review selection of users when switching between views.
Remove unused component.
Select all users when in group view.
Do not select "Show All users" for all groups.
Disable menu item if in admin view. (see #11992)
Do not allow to display group in admin view.
Add separator as suggested by gus.