mdm notification bar status msg and button markup update

components/mobile-plugins/mobile-base-plugin/org.wso2.carbon.device.mgt.mobile.ui/src/main/resources/jaggeryapps/devicemgt/app/units/mdm.unit.ui.navbar.nav-menu/nav-menu.hbs

@@ -98,8 +98,7 @@
          data-offset-top="80">
         <ul class="sidebar-messages">
         </ul>
-        <h4 class="text-center"><a href="{{appContext}}notification-listing" class="text-center">Show all notifications</a>
-        </h4>
+        <div class="text-center"><a href="{{appContext}}notification-listing" class="btn btn-primary">Show all notifications</a></div>
     </div>
 {{/zone}}
 {{#zone "bottomJs"}}

components/mobile-plugins/mobile-base-plugin/org.wso2.carbon.device.mgt.mobile.ui/src/main/resources/jaggeryapps/devicemgt/app/units/mdm.unit.ui.navbar.nav-menu/public/js/nav-menu.js

@@ -129,7 +129,7 @@ function loadNewNotifications() {
                                 viewModel["notifications"] = responsePayload["notifications"];
                                 $(messageSideBar).html(template(viewModel));
                             } else {
-                                $(messageSideBar).html("<h4 class='text-center'>No new notifications found...</h4>");
+                                $(messageSideBar).html('<div class="message message-info message-no-new"><h4><i class="icon fw fw-info"></i>No new notifications found...</h4></div>');
                             }
                         } else {
                             $(messageSideBar).html("<h4 class ='message-danger'>Unexpected error " +