Bug 29163 SafeRunnable needs to be accessible in JFace
We need to be able to access the SafeRunnable in JFace in order that some error protection can be added to preferences and properties dialogs.
bundles/org.eclipse.ui.workbench/extensions/org/eclipse/jface/dialogs/ProgressMonitorDialog.java
* Indicates whether the Cancel button is to be enabled.
	 */
	protected boolean enableCancelButton;
		
	/**
	 * The progress monitor.
	 */
	private ProgressMonitor progressMonitor = new ProgressMonitor();
	/**
	 * The name of the current task (used by ProgressMonitor).
	 */
	private String task;
	/**
	 * The number of currently running runnables.
	 */
	private int runningRunnables;
	
	/**
	 * The cursor used in the cancel button;
	 */
	private Cursor arrowCursor;
	/**
	 * The cursor used in the shell;
	 */
	private Cursor waitCursor;
	
	/**
	 * Internal progress monitor implementation.
	 */
	private class ProgressMonitor implements IProgressMonitor {