Merge pull request #112 from wataridori/bug/4819

Bug #4819 when a request is deleted all notifications belong to the requ...
Task#4821 List of request must be in descending order (sorted by created_at)
Task #4820 Admin account can not be deleted
Merge pull request #113 from trungquan/Task#4821

Task#4821 List of request must be in descending order (sorted by created...
Merge pull request #114 from VanGiang/task/4820

Task #4820 Admin account can not be deleted
Task #4824 Finding request feature is running incorrectly
Merge pull request #115 from VanGiang/task/4824

Task #4824 Finding request feature is running incorrectly
Task#4823 Admin can delete request and order notifications by descending
Merge pull request #116 from trungquan/Task#4823

Task#4823 Admin can delete request. Order notifications by descending.
Bug #4826 Errors occur when searching