title: How to make the "run" button automatically launch the project with specified configuration
body: <p>With an open scala project, having open a random file, the run button looks like this:</p>
  
  <p><img src="https://i.stack.imgur.com/oxaFm.png" alt="enter image description here"></p>
  
  <p>Which outcomes like this:</p>
  
  <p><img src="https://i.stack.imgur.com/lEQfa.png" alt="enter image description here"></p>
  
  <p>But I want it to launch my specified launch configuration which only shows if the little arrow beneath the launch button is pressed:</p>
  
  <p><img src="https://i.stack.imgur.com/gflEj.png" alt="enter image description here"></p>
  
  <p>How do I setup the launch button to launch with my specified configuration?</p>