title: Value of type 'Reactive<UITextField>' has no member 'text'
body: <p>I have a code like this:</p>
  
  <pre><code>let disposeBag = DisposeBag()
  tvSearchItem.rx.text.orEmpty
      .filter { text in text.count &gt;= 3 }
      .flatMapLatest { text in cnfClient.getCNFacts(search: text, searchType: "t:t") }
      .bind(to: self.tableView.rx.items(cellIdentifier: "cell", cellType: UITableViewCell.self)) {  row, element, cell in
          if self.shouldShowSearchResults {
              cell.textLabel?.text = element["result"]!
              cell.detailTextLabel?.text = element["location"]!
          }
      }
      .disposed(by: disposeBag)
  </code></pre>
  
  <p>but Xcode gives me:</p>
  
  <p>Value of type 'Reactive' has no member 'text'</p>
  
  <p>What am I doing wrong?</p>
  
  <p>Thanks in advance!</p>