title: ListView set dummy row height
body: <p>A minor graphical annoyance but I have a ListView set to display custom objects with a set height more than the default. I attempted to use <code>setFixedCellSize()</code> which works perfectly in most uses but in one case the cell heights for some cells may grow and shrink based on user interaction. </p>
  
  <pre><code>class Example extends Label {
      private boolean change = true;
      public Example(String text) {
          super(text);
          setMinHeight(150);
          setPrefHeight(150);
          setMaxHeight(150);
          Hyperlink link = new Hyperlink("Change");
          setGraphic(link);
          link.setOnAction(ae -&gt; {
              change = !change;
              if(change) {
                  setMinHeight(80);
                  setPrefHeight(80);
                  setMaxHeight(80);
              } else {
                  setMinHeight(180);
                  setPrefHeight(180);
                  setMaxHeight(180);
              }
          });
      }
  }
  
  ListView&lt;Node&gt; list = new ListView&lt;&gt;();
  list.setFixedCellSize(150);
  list.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
  list.getItems().addAll(new Example("Hello world"), new Example("12345"));
  </code></pre>
  
  <p>In my example above, the label changes height when the Hyperlink is clicked. It no longer does this when <code>setFixedCellSize()</code> is added. Is there another way achieve the same effect of changing the dummy rows but allow the custom Nodes to change height?</p>