Remove default background if avatar image is assigned
If a transparent avatar image is assigned the default avatar shines through (see example image).
This might be fixed by just using an <img>-Tag for including the default avatar SVG and removing the CSS background and :after pseudo element. If a custom avatar is uploaded its path is assigned to the src attribute, otherwise the SVG default one is.
Another solution would be to add a CSS class modifier if a custom avatar is assigned and then just override the needed CSS rules.