Bug 120921 [PopupDialog] Keybindings lost after using PopupDialog
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/PopupDialog.java
titleSeparator = null;
		infoSeparator = null;
		infoLabel = null;
		toolBar = null;
		
		
		
		if (showDialogMenu && showPersistAction) {
			IDialogSettings settings = getDialogSettings();
			if (settings != null) {
				persistBounds = settings.getBoolean(getClass().getName()
						+ DIALOG_USE_PERSISTED_BOUNDS);
			}
		}
	}
	
	/**
	 * The dialog is being disposed.  Dispose of any resources allocated.
	 *
	 */
	private void handleDispose() {
		if (infoFont != null && !infoFont.isDisposed())
			infoFont.dispose();
		infoFont = null;
		if (titleFont != null && !titleFont.isDisposed())
			titleFont.dispose();
		titleFont = null;
	}
}