AMBARI-6809. "All || None" should displayed in one line. (akovalenko)

ambari-web/app/styles/application.less

@@ -808,7 +808,7 @@ h1 {
       max-height: 440px;
       position: relative;
       #component_assign_table {
-        tbody td {
+        tbody td, th {
           white-space: nowrap;
         }
         .trim_hostname {