Switch to side-by-side view

--- a/Allura/allura/lib/helpers.py
+++ b/Allura/allura/lib/helpers.py
@@ -281,7 +281,7 @@
         return value.isoformat()
 
 def absurl(url):
-    from tg import request
+    if url is None: return None
     if '://' in url: return url
     return request.scheme + '://' + request.host + url