fnUpdateProgressNavigator = function () {
				var oProgressNavigator = this._getProgressNavigator();
				oProgressNavigator && oProgressNavigator._updateCurrentStep(this._aStepPath.indexOf(oStep) + 1);
			}
Goes to the given step. The step must already be activated and visible. You can't use this method on steps
that haven't been reached yet.
@param {sap.m.WizardStep} oStep The step to go to.
@param {boolean} bFocusFirstStepElement Defines whether the focus should be changed to the first element.
@returns {this} Pointer to the control instance for chaining.
@public