Bug 137898 [Contributions] Icon tool tips should also show key bindings in Debug view
The tool tips for icons in the tool bar should also display the key bindings of the actions. E.g. the tooltip [Step Into] should be [Step Into (F5)] cf. Preferences -> Keys(Experimental) : there is the icon and the binding
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ExternalActionManager.java
* 
		 * @param identifier
		 *            The identifier of the item to from the listener should be
		 *            removed; must not be <code>null</code>.
		 * @param listener
		 *            The listener to be removed; must not be <code>null</code>.
		 */
		public void removePropertyChangeListener(String identifier,
				IPropertyChangeListener listener);
	}
	/**
	 * The singleton instance of this class. This value may be <code>null</code>--
	 * if it has not yet been initialized.
	 */
	private static ExternalActionManager instance;
	/**
	 * Retrieves the current singleton instance of this class.
	 * 
	 * @return The singleton instance; this value is never <code>null</code>.
	 */
	public static ExternalActionManager getInstance() {
		if (instance == null) {
			instance = new ExternalActionManager();
		}
		return instance;
	}
	/**
	 * The callback mechanism to use to retrieve extra information.
	 */
	private ICallback callback;