message: Fix thread preview
diff: @@ -27,7 +27,7 @@ const Content = React.memo((props) => {
  numberOfLines={props.tmid ? 1 : 0}
  channels={props.channels}
  mentions={props.mentions}
  - useMarkdown={props.useMarkdown}
  + useMarkdown={props.useMarkdown && !props.tmid}
  navToRoomInfo={props.navToRoomInfo}
  tmid={props.tmid}
  />
  