title: JavaFx - TextField.setText() not working
body: <p>im trying to add some text to a textfield, but when i click the button nothing happens , why is this happening?</p>
  
  <p>MainWindowController.java</p>
  
  <pre><code>@FXML
  public static TextField konsumatoriPunetField = new TextField();
  
  @FXML
  private void initialize()
  {
      FXMLLoader loader5 = new FXMLLoader();
      loader5.setLocation(getClass().getResource("ZgjedhKonsumatorinFXML.fxml"));
      BorderPane border5 = new BorderPane();
      border5 = loader5.load();
      Scene scene5 = new Scene(border5);
      zgjedhkonsumatorinstage.setScene(scene5);
      zgjedhkonsumatorinstage.setTitle("Pit Stop");
      zgjedhkonsumatorinstage.initModality(Modality.WINDOW_MODAL);
      zgjedhkonsumatorinstage.initOwner(MainFXMLController.mainFXMLStage);
  }
  
  @FXML
  public void zgjedhKonsumatorin()
  {
      zgjedhkonsumatorinstage.showAndWait();
  }
  </code></pre>
  
  <p>MainWindowFXML.fxml</p>
  
  <pre><code>&lt;TextField fx:id="konsumatoriPunetField" editable="false" onMouseClicked="#zgjedhKonsumatorin" promptText="Kliko per te zgjedhur" GridPane.columnIndex="1" GridPane.rowIndex="1" /&gt;
  </code></pre>
  
  <p>ZgjedhKonsumatorinController.java</p>
  
  <pre><code>@FXML
  public void zgjedhKonsumatorin()
  {
      MainWindowController.zgjedhkonsumatorinstage.close();
      MainWindowController.konsumatoriPunetField.setText("ertani");
  
  }
  </code></pre>
  
  <p>ZgjedhKonsumatorinFXML.fxml</p>
  
  <pre><code>&lt;Button mnemonicParsing="false" onAction="#zgjedhKonsumatorin" prefWidth="150.0" text="Zgjedh Konsumatorin" /&gt;
  </code></pre>