If not logged in, show login page content

If not logged in, show login page content

It was so that when one is on the members only page, the content
of that page would show in addition to the login form. This was
requested to be changed so that the members only login page text is
separate from the members only page text.

Code has also been added to try handling redirection; currently
when someone logs in on the front-end, the Contacts plugin forces
them to be redirected to the members only page, even if a different
url is supplied to the form. If that can be disabled, this code
would make it so one is only navigated to the Members Only page if
attempting to log in from the Members Only Login page, and
otherwise stay on their current page.