Login redirect doesn't work with modals

[Paul McMillan]

When a user would normally get redirected to the login screen, if they click a button that brings up a modal dialog, they are presented with an incorrect login screen within the modal. The entire page should reflect the login screen, rather than framing in the modal.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/4601

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/4601
Committed: http://github.com/openstack/horizon/commit/e040ad12a0fd551ec28a4c5218a7069b2402805e
Submitter: Jenkins
Branch: master

commit e040ad12a0fd551ec28a4c5218a7069b2402805e
Author: Tihomir Trifonov <email address hidden>
Date: Mon Feb 27 20:45:57 2012 +0200

    Prevents unauth'd view calls from popping up login in modal window.

    Fixes bug 929309

    Note: The authentication logic is slightly changed -
    login_required decorator is replaced by a Horizon decorator,
    that raises NotAuthorized exception instead redirecting
    to login page. Then, all unauthorized requests are now
    handled by Horizon Middleware, and performs a check if
    the request is from ajax call(then returns error 401),
    otherwise - redirects to login page, persisting the
    requested page in ?next= variable.

    Change-Id: Ic90658bff2eabfe630b1f9912cf4a5aa45edf58e