title: Center and right/left align items in a NativeScript Layout
body: <p>In the context of a NativeScript app, I've been struggling to find an efficient, non-hacky way to do what seems pretty simple: have one item in the center of a layout, and another item all the way to the right or left of the layout--something like the images in this question: <a href="https://stackoverflow.com/questions/38948102/center-and-right-align-flexbox-elements">Center and right align flexbox elements</a>. The items should all be in a single row as they are there. (I've looked through those solutions, but I don't want to add a pseudo-element, and a lot of CSS just doesn't work with NativeScript.) Is there some kind of clean, canonical way to do this with the default layouts?
  In case this isn't "specific" enough, say I have a scenario like this:</p>
  
  <pre><code>&lt;SomeLayout&gt;
    &lt;Label text="Center me"&gt;&lt;/Label&gt;
    &lt;Label text="Pull me to the right"&gt;&lt;/Label&gt;
  &lt;/SomeLayout&gt;
  </code></pre>
  
  <p>The text properties of the labels describe what I'm looking for. Please test any suggestions or be sure that they work.</p>