Sets the name of the icon in the icon theme to use when the icon should be
displayed.
If no name is set, the avatar-default-symbolic icon will be used.
If the name doesn't match a valid icon, it is an error and no icon will be
displayed.
If the icon theme is changed, the image will be updated automatically.
Sets the name of the icon in the icon theme to use when the icon should be displayed. If no name is set, the avatar-default-symbolic icon will be used. If the name doesn't match a valid icon, it is an error and no icon will be displayed. If the icon theme is changed, the image will be updated automatically.