title: JavaFX: Fit child elements to HBox width
body: <p>Is it possible to manage child elements in a HBox, so that the sum of the widths of all child elements is equal to the width of the HBox?</p>
  
  <p>So that elements fill the HBox and no space is left. </p>
  
  <p>The height of the child elements is by default the height of the HBox, so how about the width? I don't want to calculate the width in my program. It would be better if the layout does this automatically, so that no calculation is needed.</p>