title: Eclipse preference page with multiple arrays
body: <p>I tried to search the internet for examples for doing that, but can not find a good one. Also I checking eclipse IDE source code, but it's a bit too big to filter out what I need for an example.</p>
  
  <p>What I would need is something similar to Eclipse File Association page below.</p>
  
  <p>My plan is later to replace File types list with a combo and add more values/controls per combo selection.</p>
  
  <p>I would be very thankful for an example or a link to an example that does that or has a same concept with working preference store.</p>
  
  <p>Thank you!</p>
  
  <p><img src="https://i.stack.imgur.com/Apf03.png" alt="enter image description here"></p>