fixes #2876: Changing approver/contributor privileges should log mod action

app/controllers/admin/users_controller.rb

@@ -9,11 +9,8 @@ module Admin
 
     def update
       @user = User.find(params[:id])
-      @user.promote_to!(
-        params[:user][:level],
-        :can_approve_posts => params[:user][:can_approve_posts],
-        :can_upload_free => params[:user][:can_upload_free]
-      )
+      promotion = UserPromotion.new(@user, CurrentUser.user, params[:user][:level], params[:user])
+      promotion.promote!
       redirect_to edit_admin_user_path(@user), :notice => "User updated"
     end
   end