Use internationalization feature for added text

GitLab: #81
Change-Id: Ie8c3b62545d954922f5c90387c5d361d07cb8cf2
diff --git a/client/src/components/AlertSnackbar.tsx b/client/src/components/AlertSnackbar.tsx
index c32eca8..287cd60 100644
--- a/client/src/components/AlertSnackbar.tsx
+++ b/client/src/components/AlertSnackbar.tsx
@@ -38,6 +38,10 @@
       }}
     >
       <Alert severity={severity} {...alertProps}>
+        {/* For i18n-parser.
+          t('severity_error')
+          t('severity_success')
+        */}
         <AlertTitle>{t(`severity_${severity}`)}</AlertTitle>
         {children}
       </Alert>