Avatar background is grey by default, which is always visible

[hanastasov]

1. Add an image avatar
2. The image avatar always has grey background applied. This grey background because is not only visible for image avatars with transparent background, it's also visible when the avatar has a specific background color set as background (for example, if you set red as yellow, you'll see the result of red + a shade of gray:

    <igx-avatar
      **src="https://svgshare.com/i/mYB.svg"
      bgColor="yellow"**
      [roundShape]="true"
      size="medium"
    ></igx-avatar>

Result