title: PyCharm: lost ipython kernel window
body: <p>This is really silly, but it's driving me nuts! </p>
  
  <p>Normally when I run ipython notebook through pycharm, the first time I click on the 'play' button to run a cell, PyCharm asks me if I want to start the kernel. When I say yes, it gives me a nice kernel window that shows me output from commands and errors. </p>
  
  <p>I really like this feature for debugging, but somehow it went away. PyCharm no longer asks if I would like to start the kernel, and I no longer can find the kernel window. My notebook is still running just fine, so the ipython kernel must be started somewhere. </p>
  
  <p>Can someone please tell me how to view the kernel window? </p>
  
  <p>Thanks so much! </p>