title: Eclipse RCP4 close Part on exit / disable persistence of a Part?
body: <p>i'm working on an Eclipse RCP4 project. I have different perspectives showing a set of Parts to choose informations from. After selecting what i want to see, a new Part opens and displays the objet i want to edit / view attibutes of.
  I can open many parts of the same type. If i close the application, the eclipse framwork persists the position of all opened Parts. If i restart the application all previously opened Parts are open but without informations.</p>
  
  <p>-How to prevent Eclipseframwork from persisting the state of Parts?</p>
  
  <p>-How to close Parts on exit?</p>
  
  <p>I'm searching for a way to add an "removeOnExit" tag to a Part and than close such a marked Part on exit.</p>
  
  <p>Thanks in advance :)</p>