(bug 47746) Fixing Phantom placement in RTL

CSSJanus flips left for right for RTL languages. To ensure proper positioning of phantoms, the phantom container must actually be set to left:0, not right:0. Added the @noflip option before the phantoms selector to prevent CSSJanus from modifying it.

Change-Id: Id7662362d117d6c5719b9b98d7a0dbf62e9ba3ff