Revert "IE8 mega menu css added"

This reverts commit 9a4aa3ec6a1d63b2d43b8da9e91c86b008d8cc68.
Revert "Revert "IE8 mega menu css added""

This reverts commit f619b2816f5a9c80d0850c7788acfc8a698a6284.
added an expert and read more updates