Make User.profile a single object instead of a list

Because it’s a one-to-one relationship anyway, what’s the use of lists here?

calsocial/__init__.py

@@ -256,12 +256,10 @@ class CalendarSocialApp(Flask):
 
         from .models import Profile, User
 
-        try:
-            profile = Profile.query.join(User).filter(User.username == username.lower()).one()
-        except NoResultFound:
+        profile = current_user.profile
+
+        if profile is None:
             abort(404)
-        except MultipleResultsFound:
-            abort(500)
 
         return render_template('profile-details.html', profile=profile)