AMBARI-5079. X icon on the Select Stack Repo section is shown in red. (xiwang via yusaku)

ambari-web/app/styles/application.less

@@ -5524,6 +5524,9 @@ i.icon-asterisks {
         padding-right: 4px;
         a {
           cursor: pointer;
+          text-decoration: none;
+        }
+        .icon-remove-sign {
           color: #808080;
         }
       }