Bug 170884 [open type] problem with incomplete results
20070118 It seems that sometimes no search matches are shown, only the history entries. - Open the dialog on a larger workspace - Quickly enter two characters and then remove the second one with backspace - You can see that the search is interrrupted at 60% and doesn't start again after the backspace - the result only contains history entries
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/FilteredResourcesSelectionDialog.java
* 
		 * @param workingSet
		 *            the working set the filter should work with
		 */
		public void setWorkingSet(IWorkingSet workingSet) {
			resourceWorkingSetFilter.setWorkingSet(workingSet);
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer,
		 *      java.lang.Object, java.lang.Object)
		 */
		public boolean select(Viewer viewer, Object parentElement,
				Object element) {
			if (element instanceof ItemsListSeparator) {
				return true;
			} else if (element instanceof IResource) {
				return resourceWorkingSetFilter.select(viewer, parentElement,
						element);
			}
			return false;
		}
	}
	/**
	 * ResourceProxyVisitor to visit resource tree and get matched resources.
	 * During visit resources it updates progress monitor and adds matched
	 * resources to ContentProvider instance.
	 */
	private class ResourceProxyVisitor implements IResourceProxyVisitor {