Suppress section edit links with action=render

action=render is often used to pull the rendered HTML of an article
for inclusion in a different context. More often than not, the edit
links are not desired in that context.

This reverts commit a04b5d5dcb1cef9cff45170b3eee6651337678be
and redoes Iab02cbd42f2f93f0f5264a74691ae1b84f296f12.

Bug: 19415
Change-Id: I26213653c017c2e19a6f6799f3ea0676ff8524d1
Merge "Suppress section edit links with action=render"