Bug 190360 [pde viz] Nodes appear on top of one another
When the pde view is opened the nodes appear on top of one another.
bundles/org.eclipse.ui.navigator.resources/src/org/eclipse/ui/internal/navigator/resources/actions/CopyAction.java
} catch (SWTError e) {
            if (e.code != DND.ERROR_CANNOT_SET_CLIPBOARD) {
				throw e;
			}
            if (MessageDialog
                    .openQuestion(
                            shell,
                            "Problem with copy title", 
                            "Problem with copy.")) { 
				setClipboard(resources, fileNames, names);
			}
        }
    }
    /**
     * The <code>CopyAction</code> implementation of this
     * <code>SelectionListenerAction</code> method enables this action if 
     * one or more resources of compatible types are selected.
     */
    protected boolean updateSelection(IStructuredSelection selection) {
        if (!super.updateSelection(selection)) {
			return false;
		}
        if (getSelectedNonResources().size() > 0) {
			return false;
		}
        List selectedResources = getSelectedResources();
        if (selectedResources.size() == 0) {
			return false;
		}
        boolean projSelected = selectionIsOfType(IResource.PROJECT);