title: Custom StructuredTextEditor not showing colour codes when opening html code.
body: <p>I have this custom StructuredTextEditor that opens a customised HTML code in an eclipse plugin project. In earlier version, the codes were visible but ever since I ported it over to Eclipse Juno, compiled it and ran it, the editor doesn't show any codes in colour. Also, '<strong>UNDO</strong>' function doesn't work. </p>
  
  <p><em>What the page should look like:</em></p>
  
  <p><img src="https://i.stack.imgur.com/DActu.png" alt="enter image description here"></p>
  
  <p><em>What the page actually looks like:</em></p>
  
  <p><img src="https://i.stack.imgur.com/Lr4wa.png" alt="enter image description here"></p>