Reveal z-index conflict with opened top-bar menu on iPhone

When bringing up a reveal modal that overlays a dropped down top-bar menu, the touch area for the menu is above the z-index of the modal, making it difficult to close the modal.

A fix for this was to increase the z-index of both .reveal-modal-bg and .reveal-modal from 98 and 99 to 198 and 199 respectively.

It appears the issue is with the .fixed class which also shares the default z-index of 99. I haven't test this, but I am sure that moving the .fixed class to a z-index of 97 (below the modal) should solve the conflict also.