Bug 36519 [call hierarchy] ability to copy the view's content to the clipboard
we should add the ability to copy the view's content to the clipboard (it may be useful for people to take a pic of the callgraph and show to other people, for example)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyViewPart.java
public void gotoHistoryEntry(IMethod entry) {
        if (fMethodHistory.contains(entry)) {
            setMethod(entry);
        }
    }
    /* (non-Javadoc)
     * Method declared on IViewPart.
     */
    public void init(IViewSite site, IMemento memento)
        throws PartInitException {
        super.init(site, memento);
        fMemento = memento;
    }
    public void jumpToDeclarationOfSelection() {
        ISelection selection = null;
        selection = getSelection();
        if ((selection != null) && selection instanceof IStructuredSelection) {
            Object structuredSelection = ((IStructuredSelection) selection).getFirstElement();
            if (structuredSelection instanceof IMember) {
                CallHierarchyUI.jumpToMember((IMember) structuredSelection);
            } else if (structuredSelection instanceof MethodWrapper) {
                MethodWrapper methodWrapper = (MethodWrapper) structuredSelection;
                CallHierarchyUI.jumpToMember(methodWrapper.getMember());
            } else if (structuredSelection instanceof CallLocation) {
                CallHierarchyUI.jumpToMember(((CallLocation) structuredSelection).getCalledMember());
            }
        }
    }
    public void jumpToSelection(ISelection selection) {
        if ((selection != null) && selection instanceof IStructuredSelection) {