Side Navigation Bar: Make Favicon Image Container Background White

[zcolah]

Describe the bug
Currently if a user selects their Favicon to be a PNG image, it may have transparent parts to it. This results in the PNG Image not looking great in our UI. See reference image below.

Solution
May we add a white background (background-paper) to the div container holding the image? This will make the image look a lot better in our UI as compared to now. It would look something like this.

May you also change the object-fit to "contain" instead of "cover" when doing this? This will allow the entire logo to fit in.