title: JavaFX FileChooser not returning file extension for Windows
body: <p>The following code works fine when returning a file on a mac since it automatically appends the
  file extension to the name of the file.</p>
  
  <p>On windows however i have to type in the extension of the file as part of the file name in order for it to return with that extension....even though the extension is selected in the 'save type as' pulldown menu.</p>
  
  <p>is there a way to automatically append the extension to the name when returning a file from the filechooser on windows?</p>
  
  <pre><code>FileChooser.ExtensionFilter extFilter = new   FileChooser.ExtensionFilter(fileExtension.toUpperCase()+" files(*."+fileExtension+")", "*."+fileExtension);
                  fileChooser.getExtensionFilters().add(extFilter);
  
                  //Show save file dialog 
                  final File file = fileChooser.showSaveDialog(MyStage.this);
  </code></pre>