Wrong position for `create port` and form action below ports table

[Liyingjun]

See attachments for details.

[Akihiro Motoki (amotoki)]

It seems that the position where an action form is displayed is aligned to the top of the corresponding table range.
It is not specific to Port Table.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/118475

[Akihiro Motoki (amotoki)]

In a small browser windows, "Port Create" form is not displayed completely.
This occurs in Admin Network Detail Page too, and the thing is worse because DHCP agent management form is displayed out of a browser window.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/118475
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=1467f418a6e77400871f6ab6e4b16301a6baeb4f
Submitter: Jenkins
Branch: master

commit 1467f418a6e77400871f6ab6e4b16301a6baeb4f
Author: Aaron Sahlin <email address hidden>
Date: Tue Sep 2 16:43:47 2014 -0500

    Fixed incorrect position of modal container.

    After updating to bootrap 3, the position of the modal
    container is incorrect when you scroll down on a page
    then select an action button towards the top of the page that brings up
    a modal dialog. The dialog is displayed off the bottom of the screen.

    I couldnt find a graceful way to fix the css issue, so I had to over-
    ride a bootstrap css rule using !important.

    Change-Id: I5539692a6657555e08e893339098159306836021
    Closes-bug: #1353897