Some setting access fixes

I still need to figure out why the tests fail..

flaskbb/forum/models.py

@@ -10,7 +10,7 @@
 """
 from datetime import datetime, timedelta
 
-from flask import current_app, url_for, abort
+from flask import url_for, abort
 
 from flaskbb.extensions import db
 from flaskbb.utils.helpers import slugify, get_categories_and_forums, get_forums
@@ -346,7 +346,7 @@ class Topic(db.Model):
                            a new post in the topic.
         """
         read_cutoff = None
-        if ['TRACKER_LENGTH'] > 0:
+        if flaskbb_config['TRACKER_LENGTH'] > 0:
             read_cutoff = datetime.utcnow() - timedelta(
                 days=flaskbb_config['TRACKER_LENGTH'])
 

flaskbb/utils/helpers.py

@@ -201,7 +201,7 @@ def mark_online(user_id, guest=False):
     Ref: http://flask.pocoo.org/snippets/71/
     """
     now = int(time.time())
-    expires = now + (current_app.config['ONLINE_LAST_MINUTES'] * 60) + 10
+    expires = now + (flaskbb_config['ONLINE_LAST_MINUTES'] * 60) + 10
     if guest:
         all_users_key = 'online-guests/%d' % (now // 60)
         user_key = 'guest-activity/%s' % user_id