Bug 163241 [Undo] Allow Undo notification to be turned off
When deleting a project you will always been notified that it removes the Undo History. Could we add a "Don't show this" checkbox to its dialog settings? Thanx, PW
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/actions/DeleteResourceAction.java
* 
		 * @param t
		 *            the testing mode
		 */
		void setTestingMode(boolean t) {
			fIsTesting = t;
		}
	}
	/**
	 * The id of this action.
	 */
	public static final String ID = PlatformUI.PLUGIN_ID
			+ ".DeleteResourceAction";
	/**
	 * The shell in which to show any dialogs.
	 */
	private Shell shell;
	/**
	 * Whether or not we are deleting content for projects.
	 */
	private boolean deleteContent = false;
	/**
	 * Flag that allows testing mode ... it won't pop up the project delete
	 * dialog, and will return "delete all content".
	 */
	protected boolean fTestingMode = false;
	private String[] modelProviderIds;
	/**
	 * Creates a new delete resource action.
	 *