WL-3609 Allow disabling of page disable (padlock).

The padlock doesn’t correctly stop users from accessing the content through other tools or through /direct so rather than giving users false confidence that their content can’t be accesses we want to remove the functionality.
Revert "WL-2963 Set new web content links created through the site tool to open in a popup as part of the mixed content blocking fixes."

This reverts commit a7bffb5d29242f20060525f580fb5ec8e7f08c64.