title: No Tile Palette option available in Unity editor
body: <p>The <a href="https://docs.unity3d.com/Manual/Tilemap-Palette.html" rel="noreferrer">Unity documentation</a> clearly shows Tile Palette available under Window > 2D.</p>
  
  <p><a href="https://i.stack.imgur.com/xzx1P.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xzx1P.png" alt="enter image description here"></a></p>
  
  <p>But I don't have the option available:</p>
  
  <p><a href="https://i.stack.imgur.com/7f7yV.png" rel="noreferrer"><img src="https://i.stack.imgur.com/7f7yV.png" alt="enter image description here"></a></p>
  
  <p>Where can I access the Tile Palette menu?</p>
  
  <p>I'm on OSX 10.13.6 and Unity version 2019.2.1f1</p>