make sure evolution select field in multi sites is visible in firefox (#10572)

plugins/MultiSites/angularjs/dashboard/dashboard.directive.less

@@ -177,9 +177,9 @@
   }
 
   #evolution_selector {
-    margin: -6px 0 0 5px;
-    height: 20px;
-    width: 70px;
+    height: 28px;
+    margin: -9px 0 0 5px;
+    width: 80px;
     display: inline-block;
   }