[ui] [settings] Warning should be displayed for disabled settings

[Julia Aranovich]

We have a lot of cases when a setting disabled on the OpenStack Settings tab. There is no appropriate warnings now, ui is not clear.

[Julia Aranovich (jkirnosova)]

This issue becomes more priority: https://bugs.launchpad.net/fuel/+bug/1322528.
So, I increase it's importance to Medium.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/104882

[OpenStack Infra (hudson-openstack)]

Change abandoned by Julia Aranovich (<email address hidden>) on branch: master
Review: https://review.openstack.org/104882
Reason: Moved to https://review.openstack.org/#/c/111753/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/129172

[Roman Prykhodchenko (romcheg)]

Re-targeting this bug to 6.1 because it hits code freeze in 6.0

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/129172
Committed: https://git.openstack.org/cgit/stackforge/fuel-web/commit/?id=6c12e4de61aa7467961778dfd3c3c6cea400bc17
Submitter: Jenkins
Branch: master

commit 6c12e4de61aa7467961778dfd3c3c6cea400bc17
Author: Julia Aranovich <email address hidden>
Date: Fri Oct 17 11:40:19 2014 +0400

    Warnings on UI

    Implemented displaying of warning messages for:
    - roles in Assign Roles panel
    - settings on Settings tab

    Closes-Bug: #1308920
    Closes-Bug: #1396596

    Change-Id: I192ba7bbe21f084a6394105c65593a1451333177

[Anastasia Palkina (apalkina)]

Verified on ISO #61

"build_id": "2015-01-14_22-54-45", "ostf_sha": "92ad9f8e4c509c82e07ceb093b5d579205c76014", "build_number": "61", "auth_required": true, "api": "1.0", "nailgun_sha": "bfb5ee4940555a3270362bb449fc1af4add43f20", "production": "docker", "fuelmain_sha": "", "astute_sha": "82125b0eef4e5a758fd4afa8917812e09a1f7dac", "feature_groups": ["mirantis"], "release": "6.1", "release_versions": {"2014.2-6.0": {"VERSION": {"build_id": "2015-01-14_22-54-45", "ostf_sha": "92ad9f8e4c509c82e07ceb093b5d579205c76014", "build_number": "61", "api": "1.0", "nailgun_sha": "bfb5ee4940555a3270362bb449fc1af4add43f20", "production": "docker", "fuelmain_sha": "", "astute_sha": "82125b0eef4e5a758fd4afa8917812e09a1f7dac", "feature_groups": ["mirantis"], "release": "6.1", "fuellib_sha": "89f7c94d65f75ebff01898b40aa3931bd52a8a61"}}}, "fuellib_sha": "89f7c94d65f75ebff01898b40aa3931bd52a8a61"