Added info about registration pages numeration

Author: nikkxll

frontend/src/pages/_events/slug/register/RegistrationBottomBar/index.js

@@ -82,9 +82,11 @@ const RegistrationBottomBar = ({
                 </Button>
             )}
             <Box className={classes.right}>
-                <Typography className={classes.sectionsNum}>
-                    {`${sectionsInfo.index}/${sectionsInfo.sections}`}
-                </Typography>
+                {sectionsInfo && (
+                    <Typography className={classes.sectionsNum}>
+                        {`${sectionsInfo.activeSection}/${sectionsInfo.sections}`}
+                    </Typography>
+                )}
                 <ErrorDisplay errors={errors} />
                 <Button
                     className={classes.nextButton}

frontend/src/pages/_events/slug/register/index.js

@@ -334,7 +334,7 @@ export default RequiresPermission(() => {
                                 data={formData}
                                 sectionsInfo={{
                                     sections: sections.length,
-                                    index: index + 1,
+                                    activeSection: index + 1,
                                 }}
                                 onPrev={setPrevStep}
                                 prevLabel={prevStep ? prevStep.label : null}
@@ -349,7 +349,7 @@ export default RequiresPermission(() => {
                                 data={formData}
                                 sectionsInfo={{
                                     sections: sections.length,
-                                    index: index + 1,
+                                    activeSection: index + 1,
                                 }}    
                                 label={section.label}
                                 fields={section.fields}