'Manage Hosts' page doesn't show the membership option

[Julie Pichon]

If I click on 'Manage hosts' for a host aggregates and open the link in a new page (e.g. Middle clicking), the tab and membership tables are not displayed, there is only a description.

Steps to reproduce:
1. Log in as an admin
2. Click on host aggregates
3. Create a new host aggregate if you don't have one
4. Middle-click on 'manage hosts' to open it in a new tab

Actual result:
4. Only a description is shown

Expected result:
4. Similar content than when opening the 'Manage hosts' modal with a regular click

Notes:
 - The 'host aggregate' feature code is approved but hasn't finished merging yet, see https://review.openstack.org/#/c/71061
 - The membership tables will probably show empty for now due to bug 1288270, but they should at least be displayed even if they are empty till that other bug is fixed

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/78740

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/78740
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=46a49102ab94ac207e034ea1b678fb1338190f63
Submitter: Jenkins
Branch: master

commit 46a49102ab94ac207e034ea1b678fb1338190f63
Author: facundo Farias <email address hidden>
Date: Thu Mar 6 16:00:41 2014 -0300

    Allow 'Manage Host' to show membership action

    Now on the 'Manage Host' page shows also the membership
    option to be opened on a new tab.

    Change-Id: I73c431232650c00cb5dcbac5a96382a4247690cb
    Closes-Bug: #1288280