Fixed doxygen navigation bar position for chromium web browser.

docs/extra.css

@@ -61,20 +61,26 @@ div#navrow1,div#navrow2,div#navrow3,div#navrow4 {
 	background-image:none;
 	max-width:920px;
 	margin:0em auto;
+	font-size:13px;
 }
 
 ul.tablist {
 	min-width:700px;
+	height:36px;
+	display:block;
+	position:relative;
 }
 
 .tablist a,.tablist a:hover,.tablist li,.tablist li.current a {
 	background-image:none;
 	text-shadow:none;
+	height:36px;
 }
 
 .tablist a,.tablist a:visited {
 	color:hsl(0,0%,95%);
 	text-shadow:none;
+	padding:0px 12px;
 }
 
 .tablist li.current a {