Deleting a gadget while in canvas mode causes craziness

Steps to reproduce:

1. Go to the dashboard.
2. Click the maximise button on a gadget to put it into canvas mode.
3. Use the dropdown to delete the gadget.

Result: The toolbar in the top right continually flicks between default and canvas mode states. There is constant network activity and JS exceptions: com.atlassian.gadgets.dashboard:dashboard.js:8 Uncaught TypeError: Cannot read property 'queryKey' of undefined.

Note: Min'an Tan believes this might be a regression. I have not verified this.