[#4669] Better Post.activity_url

Signed-off-by: Tim Van Steenburgh <tvansteenburgh@gmail.com>
diff --git a/Allura/allura/model/discuss.py b/Allura/allura/model/discuss.py
index 4815ceb..884f736 100644
--- a/Allura/allura/model/discuss.py
+++ b/Allura/allura/model/discuss.py
@@ -484,6 +484,10 @@
     def activity_name(self):
         return 'a comment'
 
+    @property
+    def activity_url(self):
+        return self.url_paginated()
+
     def has_activity_access(self, perm, user, activity):
         """Return True if user has perm access to this object, otherwise
         return False.