title: How do I get ipyparallel to print status updates while in wait_interactive() in Jupyterlab?
body: <p>I have the following code blocks, each in JupyterLab (this works as expected in Jupyter, but not Jupyter-Lab):</p>
  <pre><code>def work(sleepTime):
      import time
      import datetime
      start = datetime.datetime.now()
      time.sleep(sleepTime)
      return &quot;Started at: &quot;+str(start)+&quot; Slept &quot;+str(sleepTime)+&quot; Ended at: &quot;+str(datetime.datetime.now())
  </code></pre>
  <pre><code>import ipyparallel as ipp
  with ipp.Cluster(n=3) as rc:
      loadBalancedView = rc.load_balanced_view()
      ar = loadBalancedView.map(work,[10, 20, 30, 10, 20, 30, 10, 20, 30, 10, 20, 30, 10, 20, 30, 40, 1, 2, 3, 4, 10, 10, 10])
      ar.wait_interactive()
      ipp_result = ar.get()
  </code></pre>
  <pre><code>ipp_result
  </code></pre>
  <p>Everything works as expected - the output from the ipp_result cell is:</p>
  <pre><code>['Started at: 2022-05-31 17:51:12.078368 Slept 10 Ended at: 2022-05-31 17:51:22.088425',
   'Started at: 2022-05-31 17:51:12.078694 Slept 20 Ended at: 2022-05-31 17:51:32.079246',
   'Started at: 2022-05-31 17:51:12.082793 Slept 30 Ended at: 2022-05-31 17:51:42.100084',
   'Started at: 2022-05-31 17:51:22.203872 Slept 10 Ended at: 2022-05-31 17:51:32.213932',
   'Started at: 2022-05-31 17:51:32.193991 Slept 20 Ended at: 2022-05-31 17:51:52.214057',
   'Started at: 2022-05-31 17:51:32.217268 Slept 30 Ended at: 2022-05-31 17:52:02.247332',
   'Started at: 2022-05-31 17:51:42.214434 Slept 10 Ended at: 2022-05-31 17:51:52.223233',
   'Started at: 2022-05-31 17:51:52.217649 Slept 20 Ended at: 2022-05-31 17:52:12.235251',
   'Started at: 2022-05-31 17:51:52.226401 Slept 30 Ended at: 2022-05-31 17:52:22.256461',
   'Started at: 2022-05-31 17:52:02.250662 Slept 10 Ended at: 2022-05-31 17:52:12.260710',
   'Started at: 2022-05-31 17:52:12.238504 Slept 20 Ended at: 2022-05-31 17:52:32.258577',
   'Started at: 2022-05-31 17:52:12.263679 Slept 30 Ended at: 2022-05-31 17:52:42.293737',
   'Started at: 2022-05-31 17:52:22.260061 Slept 10 Ended at: 2022-05-31 17:52:32.270130',
   'Started at: 2022-05-31 17:52:32.261914 Slept 20 Ended at: 2022-05-31 17:52:52.281975',
   'Started at: 2022-05-31 17:52:32.273398 Slept 30 Ended at: 2022-05-31 17:53:02.303463',
   'Started at: 2022-05-31 17:52:42.297340 Slept 40 Ended at: 2022-05-31 17:53:22.337396',
   'Started at: 2022-05-31 17:52:52.285312 Slept 1 Ended at: 2022-05-31 17:52:53.286370',
   'Started at: 2022-05-31 17:52:53.289760 Slept 2 Ended at: 2022-05-31 17:52:55.291821',
   'Started at: 2022-05-31 17:52:55.295365 Slept 3 Ended at: 2022-05-31 17:52:58.298415',
   'Started at: 2022-05-31 17:52:58.301646 Slept 4 Ended at: 2022-05-31 17:53:02.303464',
   'Started at: 2022-05-31 17:53:02.307076 Slept 10 Ended at: 2022-05-31 17:53:12.317141',
   'Started at: 2022-05-31 17:53:02.307284 Slept 10 Ended at: 2022-05-31 17:53:12.317337',
   'Started at: 2022-05-31 17:53:12.320653 Slept 10 Ended at: 2022-05-31 17:53:22.330728']
  </code></pre>
  <p>As expected - everything starts at the same time and ends in 10, 20, and 30 seconds after each worker starts.</p>
  <p>However, the output from the second block does not display interactive progress. It only displays this:</p>
  <pre><code>Starting 3 engines with &lt;class 'ipyparallel.cluster.launcher.LocalEngineSetLauncher'&gt;
  
    0%|          | 0/3 [00:00&lt;?, ?engine/s]
  
  work:   0%|          | 0/23 [00:00&lt;?, ?tasks/s]
  
  Stopping engine(s): 1654019466
  engine set stopped 1654019466: {'engines': {'0': {'exit_code': 0, 'pid': 22707, 'identifier': '0'}, '1': {'exit_code': 0, 'pid': 22709, 'identifier': '1'}, '2': {'exit_code': 0, 'pid': 22713, 'identifier': '2'}}, 'exit_code': 0}
  Stopping controller
  Controller stopped: {'exit_code': 0, 'pid': 22649, 'identifier': 'ipcontroller-1654019465-rj2q-13840'}
  
  </code></pre>
  <p>I expected the ASCII progress bars to update as progress is made. Even when I increase the sleep times to larger values (multiple minute), it doesn't update.</p>
  <p>How can I get the progress to update as tasks complete?</p>