Fixed RTL: A little styling issue with breadcrumb in FireFox

When link in breadcrumb is hovered, the color of the arrow remains the same (Firefox)

It seems the problematic part is the use of ` -moz-border-right-colors` in here
.breadcrumb .crust .arrow span
    @property "breadcrumbItemArrowInner";
    border: 12px solid transparent;
    border-right: 1px none black;
    border-left-color: @breadcrumbItemCrumb.background-color;
    -moz-border-right-colors: @breadcrumbItemCrumb.background-color;
    display: block;
    position: absolute;
    left: -13px;
    top: -12px;
    z-index: 51;
    white-space: nowrap;
    overflow: hidden;
    text-indent: 9999px;
    width: 0px;
    height: 0px;
    @property "/breadcrumbItemArrowInner";
The issue is `-moz-border-right-colors` not replaced by `-moz-border-left-colors` in RTL.