Helios: grey background for welcome page buttons

css/helios.css

@@ -284,6 +284,7 @@ body[id="helios"] .welcome h2 {
   color: #666;
 }
 body[id="helios"] .welcome button {
+  background: #eee;
   margin: 10px;
   padding: 20px;
   height: auto;

css/helios.less

@@ -337,6 +337,7 @@ body[id="helios"] {
 		}
 
 		button {
+			background: #eee;
 			margin: 10px;
 			padding: 20px;
 			height: auto;