message: Improve a11y of default BaseAvatar
diff: @@ -132,7 +132,7 @@ const BaseAvatar = (props) => {
  );
  } else {
  return (
  - <span className="mx_BaseAvatar" ref={inputRef} {...otherProps}>
  + <span className="mx_BaseAvatar" ref={inputRef} {...otherProps} role="presentation">
  { textNode }
  { imgNode }
  </span>
  