[Backport] Order boards alphabetically

app/services/boards/list_service.rb

@@ -2,11 +2,15 @@ module Boards
   class ListService < Boards::BaseService
     def execute
       create_board! if parent.boards.empty?
-      parent.boards
+      boards
     end
 
     private
 
+    def boards
+      parent.boards
+    end
+
     def create_board!
       Boards::CreateService.new(parent, current_user).execute
     end