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 Listener menuListener = new Listener() {
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
		 */
		public void handleEvent(Event event) {
			Point pos = new Point(event.x, event.y);
			showSystemMenu(pos);
		}
	};
	private Listener dragListener = new Listener() {
		public void handleEvent(Event event) {
			Point localPos = new Point(event.x, event.y);
			CTabItem tabUnderPointer = paneFolder.getItem(localPos);
			
			if (tabUnderPointer == null) {
				if (paneFolder.getTabPosition() == SWT.BOTTOM
						&& localPos.y < paneFolder.getControl().getBounds().height
								- paneFolder.getTabHeight())
					tabUnderPointer = paneFolder.getSelection();
				else if (paneFolder.getTabPosition() == SWT.TOP
						&& localPos.y > paneFolder.getTabHeight())
					tabUnderPointer = paneFolder.getSelection();
			}
			
			 stack
			if (tabUnderPointer == null) {