Console disconnects from file on name change

[mrinalraghupathi]

When I create a new code console for a markdown file (test.md) and enter code x = 4 and then type shift-enter it appears in the code console and I can access x in the console. Now I rename the file to test2.md (rename from JupyterLab interface). Pressing shift-enter now does not send the code to the console, would be good if the console stayed connected to the file even after name change.

[ian-r-rose]

We should probably listen for pathChanged signals when we create a console for an editor/notebook to keep these in sync.