MDL-29787 FIX to remove sprite hover image from single menu item

theme/overlay/style/core.css

@@ -85,11 +85,11 @@ h1.headermain {
     -webkit-text-stroke: 1px white;
 }
 
-.headermenu .logininfo, 
-.headermenu .langmenu, 
-.headermenu .langmenu div, 
-.headermenu .langmenu form, 
-.headermenu .langmenu select, 
+.headermenu .logininfo,
+.headermenu .langmenu,
+.headermenu .langmenu div,
+.headermenu .langmenu form,
+.headermenu .langmenu select,
 .headermenu .langmenu label {
     display: inline !important;
 }
@@ -236,7 +236,7 @@ h1.headermain {
     background-color:#666;
 }
 
-#custommenu .yui3-menu-content, 
+#custommenu .yui3-menu-content,
 #custommenu .yui3-menu .yui3-menu .yui3-menu-content {
     background-image:none;
     background-color:#333;
@@ -244,6 +244,10 @@ h1.headermain {
     padding:0;
 }
 
+#custommenu .yui3-menuitem-active .yui3-menuitem-content {
+    background-image: none;
+}
+
 #custommenu .yui3-menu-label,
 #custommenu .yui3-menu .yui3-menu .yui3-menu-label {
     background-image:url([[pix:theme|vertical-menu-submenu-indicator]]);
@@ -268,7 +272,7 @@ h1.headermain {
     padding:0 20px;
 }
 
-#custommenu .yui3-menu-horizontal.javascript-disabled .yui3-menu-content, 
+#custommenu .yui3-menu-horizontal.javascript-disabled .yui3-menu-content,
 #custommenu .yui3-menu-horizontal.javascript-disabled .yui3-menu-content .ul {
     border-width:0;
 }