fix running cell when focused on output (#10517)
fix running cell when focused on output (#10517)

Co-authored-by: Cameron Toy <b64737a742def49af2dea62e0337b9ac45ef366c@users.noreply.github.com>
jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab