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
}
	/**
	 * Displays the view menu as a popup
	 */
	public void showPaneMenu() {
		IPartMenu menu = getPartMenu();
		if (menu != null) {
			Rectangle bounds = DragUtil.getDisplayBounds(viewToolBar);
			menu.showMenu(new Point(bounds.x, bounds.y + bounds.height));
		}
	}
	/**
	 * Returns the currently selected part, or <code>null</code>.
	 * 
	 * @return the currently selected part, or <code>null</code>
	 */
	protected IPresentablePart getCurrent() {
		return current;
	}
	/**
	 * Returns the index of the tab for the given part, or returns
	 * tabFolder.getItemCount() if there is no such tab.
	 * 
	 * @param part
	 *            part being searched for
	 * @return the index of the tab for the given part, or the number of tabs if
	 *         there is no such tab
	 */
	private final int indexOf(IPresentablePart part) {
		if (part == null) {