I think user should be able to add new nodes even if there are selected nodes

[Anastasia Palkina]

1. Deploy any environment with some nodes
2. Check, for example, 2 nodes and click "Delete" button
3. Nodes became "Pending deletion" and they are selected
4. But in this case "Add nodes" button not displays (see screen)

I think that it is not clear scenario and user should be able to add new nodes even if there are selected nodes

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/235968

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/237053

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/237053
Committed: https://git.openstack.org/cgit/openstack/fuel-web/commit/?id=93ea8fc367973112c339b727a5db1456bc9cceb3
Submitter: Jenkins
Branch: master

commit 93ea8fc367973112c339b727a5db1456bc9cceb3
Author: Julia Aranovich <email address hidden>
Date: Mon Oct 19 18:43:43 2015 +0300

    Always display Add Nodes button

    Closes-Bug: #1491019

    Change-Id: I5955369844f4ddd531cbea3a214bf4ed1e055ef7

[OpenStack Infra (hudson-openstack)]

Change abandoned by Alexandra Morozova (<email address hidden>) on branch: master
Review: https://review.openstack.org/235968
Reason: fix already in master

[Anastasia Palkina (apalkina)]

Verified on ISO #55 with liberty

"fuel-createmirror_sha": "d0364e7f8670faeeb1f59e110a3f68e3d2d7c83f", "api": "1.0", "fuelmain_sha": "d26eea511f0b90637e7d65cf1a93ca8b82502278", "astute_sha": "8c5c4dd8dd8cc0d512ea32f20fc63efd425737cd", "fuel-ostf_sha": "9f500668555292add5d87c942e0cd804aefa6df2", "openstack_version": "2015.1.0-8.0", "build_id": "55", "build_number": "55", "auth_required": false, "fuel-library_sha": "b9fccc093b7d4beaf68fa857e60e5b6357f2746b", "fuel-nailgun-agent_sha": "abab45cf8c7344d43acd3858c02d7a648ef7fee6", "fuel-nailgun_sha": "e6a4f84f00dbab286963bd8132c806cacbf7303a", "fuel-agent_sha": "49e2e8a08a3cf39d1b38ee155015332aa84e47fd", "production": "docker", "python-fuelclient_sha": "398b003a840e361c09b166f1a05e6c7bd92ba416", "feature_groups": ["mirantis"], "release": "8.0", "release_versions": {"2015.1.0-8.0": {"VERSION": {"fuel-createmirror_sha": "d0364e7f8670faeeb1f59e110a3f68e3d2d7c83f", "api": "1.0", "fuelmain_sha": "d26eea511f0b90637e7d65cf1a93ca8b82502278", "astute_sha": "8c5c4dd8dd8cc0d512ea32f20fc63efd425737cd", "fuel-ostf_sha": "9f500668555292add5d87c942e0cd804aefa6df2", "openstack_version": "2015.1.0-8.0", "build_id": "55", "build_number": "55", "fuel-library_sha": "b9fccc093b7d4beaf68fa857e60e5b6357f2746b", "fuel-nailgun-agent_sha": "abab45cf8c7344d43acd3858c02d7a648ef7fee6", "fuel-nailgun_sha": "e6a4f84f00dbab286963bd8132c806cacbf7303a", "fuel-agent_sha": "49e2e8a08a3cf39d1b38ee155015332aa84e47fd", "production": "docker", "python-fuelclient_sha": "398b003a840e361c09b166f1a05e6c7bd92ba416", "feature_groups": ["mirantis"], "release": "8.0"}}}