title: pywinauto type_keys can press one key but not two
body: <p><a href="https://i.stack.imgur.com/7NKVy.png" rel="nofollow noreferrer">inspect image </a></p>
  
  <p>I'm simply trying to press ALT+F then C.  The ALT+F works, the file menu opens but the C key isn't being seen.  It's possible this is due to the app under test as I've confirmed the same thing does work in Notepad.  It's odd though that ALT+F works.</p>
  
  <p>Anyone else ran into this?</p>
  
  <p>I've tried:
   - type_keys('%fc')
   - type_keys('%(fc)')
   - type_keys('%fc{ENTER}')</p>
  
  <p>full code:</p>
  
  <pre><code>    `def open_app(self):
          app = (
              application.Application(backend="win32").start(
                  self.app_object.intex_exe
              )
          ).intex
          #app = app.intex
          app.wrapper_object()
          app.wait('visible')
          sleep(1)
          app.type_keys(%fc{ENTER})`
  </code></pre>
  
  <p>Note - this does work though it's not very elegant:
      <code>file_menu = {
          'file':'%f',
          'open_node': '%f{ENTER}',
          'close_node': '%f{DOWN}{ENTER}',
          'load_rt_app': '%f{DOWN 2}{ENTER}',
          'most_recent': '%f{DOWN 3}{ENTER}',
          'exit': '%f{DOWN 4}{ENTER}'
      }</code></p>
  
  <p>And an hour of other combinations..</p>
  
  <p>I also tried navigating via the menus instead of keys but ran into:  "There is no menu" which I've found several posts for here but never a solution that worked.</p>