Bug 170668 [DataBinding] [Patch] Add SWTObservables.observeTooltipText()
Adds support for binding to SWT Control TooltipText property.
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/databinding/swt/SWTObservables.java
}
	/**
	 * @param combo
	 * @return
	 */
	public static IObservableList observeItems(CCombo combo) {
		return new CComboObservableList(combo);
	}
	/**
	 * @param list
	 * @return
	 */
	public static ISWTObservableValue observeSelection(List list) {
		return new ListObservableValue(list);
	}
	/**
	 * @param list
	 * @return
	 */
	public static IObservableList observeItems(List list) {
		return new ListObservableList(list);
	}
	/**
	 * @param table
	 * @return
	 */
	public static ISWTObservableValue observeSingleSelectionIndex(Table table) {
		return new TableObservableValue(table, SWTProperties.SELECTION);
	}
	private static class DisplayRealm extends Realm {