added accessibility hidden toggle for the slide menu. Set true on closeMenu, set false on openMenu
added accessibility hidden toggle for the slide menu. Set true on closeMenu, set false on openMenu

mcongrove/ChariTi,bright-sparks/ChariTi,mcongrove/ChariTi,bright-sparks/ChariTi,mcongrove/ChariTi,xubingyue/ChariTi,xubingyue/ChariTi