Instance dropdown displayed with no actions

[Gabriel Hurley]

If a row has one normal action and an "update" action for the ajax updating, the dropdown is still displayed due to the "hidden" update action. This should be reworked to avoid showing the dropdown. This may mean not actually rendering the action in the list at all and instead adding the relevant data as a data attribute on the row or some such thing.

[Andy Chong (andycjw)]

and the dropdown is missing because the Table Action class doesn't allow empty table data for batch action
I added check for ajax request, and bypass this check for ajax request, and the action should now shows

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/5008

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/5307

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/5307
Committed: http://github.com/openstack/horizon/commit/753ebd673c164cc0469a3de1b9ce40fefe92e99b
Submitter: Jenkins
Branch: master

commit 753ebd673c164cc0469a3de1b9ce40fefe92e99b
Author: Gabriel Hurley <email address hidden>
Date: Tue Mar 13 17:27:18 2012 -0700

    Moved ajax updating from Action to Row.

    This fixes the problem of having to "hide" the update action
    in the row's actions column. Fixes bug 948397.

    Additionally, added some protection for spillover between
    the attrs dictionary on action instances. Fixes bug 954592.

    FWIW, the code involved in the AJAX updating is largely identical,
    it's just been moved from Action to Row and had few data accessors
    renamed to account for the differing relation to Table and Row.
    This also allowed the javascript to be significantly cleaner.

    Change-Id: Ic8932a33ca6956a56c8eee09bb0a4d1f59e0ab3a