Revert "Disambiguating permissions on index page"

This was the commit which broke [#49520767] and [#49523761]. Deploying this should fix those stories.

This reverts commit 0d8f559fd9a3dbb53c82b4d1bd680183f25d9b48.

https://www.pivotaltracker.com/story/show/49523761
https://www.pivotaltracker.com/story/show/49520767
Straightening out ownership of copied activities

[#49085561] The issue seems to be with the edit immediately after the copy. If the user saves the activity off that edit, it gets re-saved without an owner…?