Bug resolved: Visibility issue of Edit button 


**Files modified:**

1) templatetags/ndf_tags.py
   - user_access_policy() modified:
     - 'group_set' field is replaced with 'author_set' field [as joined users' ids were getting saved in author_set field and while checking in this function, the code is looking for the same thing in group_set field]
     
2) views/page.py
   - Few lines commented out regarding location field which was causing problem in sandbox.metastudio server
   - I confirmed with Kedar before commenting this code.