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/wizard/WizardDialog.java
* @return a composite containing the new buttons
 */
private Composite createPreviousAndNextButtons(Composite parent) {
	
	((GridLayout)parent.getLayout()).numColumns++;
	Composite composite = new Composite(parent, SWT.NONE);
	
	GridLayout layout = new GridLayout();
	layout.numColumns = 0;  
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	layout.horizontalSpacing = 0;
	layout.verticalSpacing = 0;
	composite.setLayout(layout);
	GridData data = new GridData(
		GridData.HORIZONTAL_ALIGN_CENTER |
		GridData.VERTICAL_ALIGN_CENTER);
	composite.setLayoutData(data);
	composite.setFont(parent.getFont());
	backButton = createButton(composite, IDialogConstants.BACK_ID, IDialogConstants.BACK_LABEL, false);
	nextButton = createButton(composite, IDialogConstants.NEXT_ID, IDialogConstants.NEXT_LABEL, false);
	return composite;
}
/**
 * Creates and return a new wizard closing dialog without openiong it.
 */ 
private MessageDialog createWizardClosingDialog() {
	MessageDialog result= new MessageDialog(
		getShell(),
		JFaceResources.getString("WizardClosingDialog.title"),