Revert "Retitle "Site Visibility" setting section in portfolios as "Private""

This reverts commit 34915ae8f2cb3f364581be3a048e3318431cb519.

See #933
Revert "Adjust portfolio privacy settings. See #933"

This reverts commit 925afff71eeca6fb236dcb61cd89c45e2eae9f10.

See #933