Revert "Force to retrieve new css and js files."

This reverts commit 6cf5879a1514448b0ee4bfb867ab3734b25d06b8.
Revert "Revert "Force to retrieve new css and js files.""

This reverts commit ad54cccf236ffef97335bff62a5548f4f83ab15b.
Revert "Revert "Revert "Force to retrieve new css and js files."""

This reverts commit 02fb46981af1e111baa4dba2bfedcf63a1f91291.