N°9144 Button Back from recap screen return to extensions choice instead of data audit, Catch exception during compilation to exit maintenance mode

setup/wizardsteps/WizardStep.php

@@ -137,6 +137,15 @@ abstract class WizardStep
 		return true;
 	}
 
+	/**
+	 * Tells whether the user will come back to this step/state if he click on "Back"
+	 * @return boolean True if the 'Back' button should display this step
+	 */
+	public function CanComeBack()
+	{
+		return true;
+	}
+
 	/**
 	 * Tells whether the "Next" button should be enabled interactively
 	 * @return string A piece of javascript code returning either true or false