Put avatar is right place when sender isnt displayed in message bubbles

src/components/views/rooms/EventTile.tsx

@@ -893,6 +893,7 @@ export default class EventTile extends React.Component<IProps, IState> {
             mx_EventTile_unknown: !isBubbleMessage && this.state.verified === E2E_STATE.UNKNOWN,
             mx_EventTile_bad: isEncryptionFailure,
             mx_EventTile_emote: msgtype === 'm.emote',
+            mx_EventTile_noSender: this.props.hideSender,
         });
 
         // If the tile is in the Sending state, don't speak the message.