text: Title: display(Markdown(f'![]({relpth})') - works in Jupyter Lab (3.0.14) but not Voila (0.2.9)
  Body: ![image](https://user-images.githubusercontent.com/21370980/122106889-64c07600-ce12-11eb-8d60-c17f37e016eb.png)
  
  relevant code:
  
  ```python
  from IPython.display import display, Markdown
  display(Markdown(f'![]({relpth})')
  ```
  
  perhaps related to?
  https://github.com/voila-dashboards/voila/issues/659
  https://github.com/voila-dashboards/voila/issues/796