sort alerts in descending order of timestamp by default (#222)

Signed-off-by: Amardeepsingh Siglani <[email protected]>

Signed-off-by: Amardeepsingh Siglani <[email protected]>
(cherry picked from commit 9444e27)

Author: amsiglan

public/pages/Alerts/containers/Alerts/Alerts.tsx

@@ -428,7 +428,7 @@ class Alerts extends Component<AlertsProps, AlertsState> {
     const sorting: any = {
       sort: {
         field: 'start_time',
-        direction: 'asc',
+        direction: 'dsc',
       },
     };