Adding proper error message when no device type is avaialble

components/device-mgt/org.wso2.carbon.device.mgt.ui/src/main/resources/jaggeryapps/devicemgt/app/units/cdmf.unit.device.types.listing/public/js/listing.js

@@ -142,7 +142,13 @@ function loadDevices(searchType, searchParam){
         }
     } else {
         $('#device-grid').addClass('hidden');
-        $('#device-listing-status-msg').text('No device is available to be displayed.');
+        $('#device-listing-status-msg').html(
+            '<div class="col-centered text-center"><h3 class="text-muted"><i class="fw fw-mobile fw-3x"></i>' +
+            '</h3><h3 class="text-muted">No device type is available to be displayed.</h3>' +
+            '<a href="https://docs.wso2.com/display/IoTS100/Quick+Start+Guide" target="_blank" ' +
+            'class="btn-operations btn-default"><span class="fw-stack">' +
+            '<i class="fw fw-ring fw-stack-2x"></i> <i class="fw fw-document fw-stack-1x"></i></span>' +
+            '&nbsp;&nbsp;Quick Startup Guide</a></div>');
     }
 
     $(".icon .text").res_text(0.2);