Bug 67513 [R21PRES] view tab tool tip inconsistent with 2.1
In 2.1, the tab item tool tip appeared in the stack's title bar, not on the tab item itself. The r21presentation currently puts the tip on the tab item. I'll attach a patch that fixes the problem.
bundles/org.eclipse.ui.presentations.r21/src/org/eclipse/ui/internal/presentations/R21BasicStackPresentation.java
}
	};
	private DisposeListener tabDisposeListener = new DisposeListener() {
		public void widgetDisposed(DisposeEvent e) {
			if (e.widget instanceof CTabItem) {
				CTabItem item = (CTabItem) e.widget;
				IPresentablePart part = getPartForTab(item);
				part.removePropertyListener(childPropertyChangeListener);
			}
		}
	};
	
	private ShellAdapter shellListener = new ShellAdapter() {
		public void shellActivated(ShellEvent event) {
			shellActive = true;
			updateGradient();
		}
		public void shellDeactivated(ShellEvent event) {
			shellActive = false;
			updateGradient();
		}
	};
	private ToolBar viewToolBar;
	private ToolItem pullDownButton;
	private ToolItem closeButton;
	public R21BasicStackPresentation(R21PaneFolder control,
			IStackPresentationSite stackSite) {
		super(stackSite);
		paneFolder = control;
		shellActive = paneFolder.getControl().getShell().equals(