First round UI touch up of DOMUI based network menu.

chrome/browser/resources/menu.css

 body {
   background: -webkit-gradient(linear, left top, left bottom,
                                from(white),
                                to(#EEE));
+  cursor: default;
   margin: 0;
   -webkit-user-select: none;
   overflow: hidden;
 }
 
 .menu-item {
   white-space: nowrap;
   margin: 0;
   padding-top: 1px;
   padding-bottom: 1px;
@@ skipping 10 matching lines @@
 
 .no-icon {
   -webkit-padding-start: 19px;
 }
 
 .menu-label {
   -webkit-box-flex: 1;
   vertical-align: middle;
 }
 
-.accelerator { 
+.accelerator {
   opacity: 0.3;
   -webkit-margin-start: 15px;
 }
 
 .left-icon {
   background-position: 4px center;
 }
 
-.right-icon { 
+.right-icon {
   background-position: right center;
 }
 
 .separator {
   background: -webkit-gradient(linear, 0 0, 96% 0, from(rgba(0, 0, 0, .10)),
                                to(rgba(0, 0, 0, .02)));
   border: 0;
   height: 1px;
   margin: 4px 0;
 }
@@ skipping 29 matching lines @@
 }
 
 .scroll-button:hover {
   background-color: #DCE5FA;
 }
 
 .hidden {
   display: none;
 }