Merge pull request #5271 from kubernetes/chenopis-1.5-patch

Make caret for version drop-down more visible for v1.5

_sass/_base.sass

@@ -258,6 +258,9 @@ ul.global-nav
 				left: 0
 				background: #fff
 
+			.ui-icon
+				filter: brightness(0) invert(1)
+
 		ul
 			display: none
 			position: fixed
@@ -286,6 +289,9 @@ ul.global-nav
 .open-nav ul.global-nav li a,
 	color: $dark-grey
 
+.flip-nav ul.global-nav li a .ui-icon
+	filter: brightness(0)
+
 .flip-nav ul.global-nav li ul li a,
 	background: #fff
 	color: $dark-grey