message: Fix status bar expanded on tab-complete
  This had regressed when `_getSize` was introduced. It didn't consider tab completing.
diff: @@ -150,7 +150,9 @@ module.exports = React.createClass({
  (state.usersTyping.length > 0) ||
  props.numUnreadMessages ||
  !props.atEndOfLiveTimeline ||
  - props.hasActiveCall) {
  + props.hasActiveCall ||
  + props.tabComplete.isTabCompleting()
  + ) {
  return STATUS_BAR_EXPANDED;
  } else if (props.tabCompleteEntries) {
  return STATUS_BAR_HIDDEN;
  