title: Display and Expressions views disappearing on Debug perspective
body: <p>On Eclipse's <strong>Debug perspective</strong>, if I pin the <code>Display</code> and <code>Expressions</code> views on the panels, they just disappear some time after the debugging - apparently when Eclipse switches the perspectives again from Java/Java EE to Debug.</p>
  
  <p>Is this really a Bug (<em>or a Feature I didn't get it</em>) or is it some configuration issue? Is there any directions or workaround to make it work? Pinning them again everytime I get into debug is annoying.</p>
  
  <p>I've been having this issue from quite some time on different distributions of Eclipse (right now on <em>JBoss Developer Studio 4.0.0.GA</em>) and on different machines (<em>Windows</em>).</p>