re-parse MOTDs if required on init

app/routes/mod.py

@@ -4,7 +4,7 @@ from flask import (
     )
 from .users import get_active_user, is_logged_in
 from ..models import Users, PasswordResetLinks, MOTD
-from ..constants import InfoboxKind
+from ..constants import InfoboxKind, MOTD_BANNED_TAGS
 from ..lib.babycode import babycode_to_html, BABYCODE_VERSION
 from ..db import db
 import secrets
@@ -73,7 +73,7 @@ def motd_editor_form():
     data = {
             'title': title,
             'body_original_markup': orig_body,
-            'body_rendered': babycode_to_html(orig_body, banned_tags=['img', 'spoiler']),
+            'body_rendered': babycode_to_html(orig_body, banned_tags=MOTD_BANNED_TAGS),
             'format_version': BABYCODE_VERSION,
             'edited_at': int(time.time()),
     }