improve description of the purge_inactive_users_grace_period_days sit…

…e setting

config/locales/server.en.yml

@@ -825,7 +825,7 @@ en:
     clean_up_uploads: "Remove orphan unreferenced uploads to prevent illegal hosting. WARNING: you may want to back up of your /uploads directory before enabling this setting."
     clean_orphan_uploads_grace_period_hours: "Grace period (in hours) before an orphan upload is removed."
     purge_deleted_uploads_grace_period_days: "Grace period (in days) before a deleted upload is erased."
-    purge_inactive_users_grace_period_days: "Grace period (in days) before an inactive user is deleted."
+    purge_inactive_users_grace_period_days: "Grace period (in days) before a user who has not activated their account is deleted."
     enable_s3_uploads: "Place uploads on Amazon S3 storage. IMPORTANT: requires valid S3 credentials (both access key id & secret access key)."
     s3_use_iam_profile: 'Use AWS EC2 IAM role to retrieve keys. NOTE: enabling will override "s3 access key id" and "s3 secret access key" settings.'
     s3_upload_bucket: "The Amazon S3 bucket name that files will be uploaded into. WARNING: must be lowercase, no periods."