title: How to add menu items separators which work as expected on OSX?
body: <p>On <strong>Windows</strong> platform, with the <strong>VCL</strong>, when we want to add a <strong>separator</strong> in a menu, we add a <code>TMenuItem</code> with a <code>Caption := '-'</code>;</p>
  
  <p>With <strong>FireMonkey</strong>, we add a <code>TMenuItem</code> with a <code>Text := '-'</code>;</p>
  
  <p>It works as expected on Windows platform, the item with the Text='-' is displayed as a separator.</p>
  
  <p>But, when I run the same application on <strong>OSX</strong>, I have the minus sign visible...</p>
  
  <p>I haven't found any property on the <code>TMenuItem</code> to specify it is a <strong>separator</strong>...</p>
  
  <p>I have tried with a <code>TMainMenu</code> and a <code>TMenuBar</code> (<code>UseOSMenu := True|False;</code>) and I still have this issue.</p>
  
  <p><strong>Any idea to create a real separator?</strong> (otherwise, I will check the OS and remove it if OSX...)</p>