Resource leak - to many images created

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Open the Runner view
2. Add a couple of categories
3. Navigate in the tree a bit and also open the run configuration dialog.
4. Eventually (especially if you have many launches (we have over 100!)) you 
will run out of handles and eclipse will terminate.

What version of the product are you using? On what operating system?
1.3.0 on Windows

Please provide any additional information below.

I added the following to the class RunnerPlugin and replaced the call to 
createImage with this one where appropriate. This looks promising as far as I 
can tell.

public Image getImage(String pImage) {
  if (mImageRegistry == null) {
    mImageRegistry = new ImageRegistry(Display.getDefault());
  }
  Image tImage = mImageRegistry.get(pImage);
  if (tImage == null) {
    tImage = getImageDescriptor(pImage).createImage();
    mImageRegistry.put(pImage, tImage);
  }
  return tImage;
}

Original issue reported on code.google.com by [email protected] on 7 Dec 2011 at 2:03