Merge pull request #3011 from rabbitmq/autoack-clarification

More accurate ack mode description in the UI

(cherry picked from commit a20cd9e)

Author: michaelklishin

deps/rabbitmq_management/priv/www/js/tmpl/queue.ejs

@@ -290,7 +290,7 @@
           <td>
             <select name="ackmode">
                 <option value="ack_requeue_true" selected>Nack message requeue true</option>
-                <option value="ack_requeue_false">Ack message requeue false</option>
+                <option value="ack_requeue_false">Automatic ack</option>
                 <option value="reject_requeue_true">Reject requeue true</option>
                 <option value="reject_requeue_false">Reject requeue false</option>
             </select>