fix positioning bug, remove now-obselete styles

the styles were obseleted by the recent button changes

less/navbar.less

@@ -16,17 +16,15 @@ nav, .navbar-link:hover, .navbar a.pagename, .navbar a {
 	color: #aaa;
 	top: -1px;
 	font-size: 14px;
+	position: relative;
 }
 
 button.btn.close.btn-sm {
 	background: #000;
 	visibility: hidden;
 	float: right;
-	margin-right: 4px;
 	margin-top: -51px;
 	font-size: 25px;
-	color: #fff;
-	border: 0;
 }
 
 .current {