2 columns of turquoise showing around widget

[AnthonyAndroulakis]

Describe the bug When a Niivue widget is created, 2 columns of turquoise can be seen on the left and right sides.

To Reproduce Steps to reproduce the behavior:

1. Install ipyniivue using the installation steps. If needed, install yarn using npm install -g yarn
2. Open jupyter lab using jupyter lab
3. Open the examples -> introduction.ipynb file
4. Run the first two code sections.
5. See the strips of turquoise on the left and right sides of the Niivue widget.

Expected behavior No turquoise should be visible unless the background color is set to turquoise. Since the default background color is black, the background should just consist of black.

Screenshots Current display. The arrows at the bottom point to the thin strips of turquoise.

[hanayik]

@AnthonyAndroulakis , is that just the "focus" ring around the canvas since the canvas has focus when it is attached to a niivue instance?

[AnthonyAndroulakis]

hm, I didn't know about canvas focus rings. It could be case. This is probably not a bug then, right?