Change avatar to use Compound implementation (#11448)

* Move avatar to new compound implementation

* Make space avatars square

* Remove reference to the avatar initial CSS class

* remove references to mx_BaseAvatar_image

* Fixe test suites

* Fix accessbility violations

* Add ConfirmUserActionDialog test

* Fix tests

* Add FacePile test

* Fix items clipping in members list

* Fix user info avatar sizing

* Fix tests

src/components/views/rooms/ReadReceiptMarker.tsx

@@ -214,9 +214,7 @@ export default class ReadReceiptMarker extends React.PureComponent<IProps, IStat
                     fallbackUserId={this.props.fallbackUserId}
                     aria-hidden="true"
                     aria-live="off"
-                    width={14}
-                    height={14}
-                    resizeMethod="crop"
+                    size="14px"
                     style={style}
                     inputRef={this.avatar as RefObject<HTMLImageElement>}
                     hideTitle