Redirect to referer after login.

[angaither]

Fixes #1023

[aaronschachter]

Looks like it will work, just reading up on using HTTP_REFERER ...

http://drupal.stackexchange.com/questions/44264/how-to-redirect-user-to-previous-page-after-form-submit suggests having a fallback in place, and "Remember that some browser does not set $_SERVER['HTTP_REFERER'] and if a user browses directly to the page, "

What are your thoughts about that? Would an alternative be to set the form's action, like we do in the campaign_data ?

[angaither]

I remember needing to set the action to submit the hidden forms to the correct urls, then this 'redirect' happens after that action.
If someone goes directly to the '/user' page they will be taken to their profile.

[aaronschachter]

Right, it makes sense that you'd get taken their profile on /user.

I'm happy to merge and see how goes. Google shows some talk of issues with varnish and HTTP_REFERER, not sure if we're set up with varnish on our local installs.

[angaither]

varnish....
we will give it a try..... wishing on 🌠