Fix double wrapping of members in a presenter

We use `present_members` here so that associations are preloaded.
We do this even if there's only one record here because it raises
an exception when user.status isn't preloaded.

app/controllers/concerns/membership_actions.rb

@@ -21,9 +21,9 @@ module MembershipActions
     member = Members::UpdateService
       .new(current_user, update_params)
       .execute(member)
-      .present(current_user: current_user)
 
-    present_members([member])
+    member = present_members([member]).first
+
     respond_to do |format|
       format.js { render 'shared/members/update', locals: { member: member } }
     end