[UI] It's unable to save changes and proceed from "you have unsaved changes" dialog

[Nick Bogdanov]

When you navigate away from a page with pending changes, you have to leave discarding changes, or cancel the request to navigate away. You don't have any choice to save and leave on the popup.

Possible solution:
Add ability to save on navigate away popup.

Extracts #3 from https://bugs.launchpad.net/fuel/+bug/1340353 as other two require additional design and approval.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/163747

[OpenStack Infra (hudson-openstack)]

Change abandoned by Dmitry Pyzhov (<email address hidden>) on branch: master
Review: https://review.openstack.org/163747
Reason: No activity for more than a month

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/163747
Committed: https://git.openstack.org/cgit/stackforge/fuel-web/commit/?id=3522ef98aee076825902a65b27012b0c8b0f5af0
Submitter: Jenkins
Branch: master

commit 3522ef98aee076825902a65b27012b0c8b0f5af0
Author: Nick Bogdanov <email address hidden>
Date: Thu Mar 12 13:06:49 2015 +0300

    Adds apply button to unsaved changes dialog

    Introduces unsavedChangesMixin to pages where unsaved changes might
    be lost. When these cases detected user gets a dialog
    prompting to Cancel/Discard/Save their changes.

    Change-Id: I3d370ed1fecdf35d70de98b09c00fc3d96a8d122
    Closes-Bug: #1428633
    Closes-Bug: #1340353
    Closes-Bug: #1441093

[Julia Aranovich (jkirnosova)]

Verified on ISO#286

{"build_id": "286", "build_number": "286", "release_versions": {"2015.1.0-7.0": {"VERSION": {"build_id": "286", "build_number": "286", "api": "1.0", "fuel-library_sha": "ff63a0bbc93a3a0fb78215c2fd0c77add8dfe589", "nailgun_sha": "5c33995a2e6d9b1b8cdddfa2630689da5084506f", "feature_groups": ["mirantis"], "fuel-nailgun-agent_sha": "d7027952870a35db8dc52f185bb1158cdd3d1ebd", "openstack_version": "2015.1.0-7.0", "fuel-agent_sha": "082a47bf014002e515001be05f99040437281a2d", "production": "docker", "python-fuelclient_sha": "1ce8ecd8beb640f2f62f73435f4e18d1469979ac", "astute_sha": "8283dc2932c24caab852ae9de15f94605cc350c6", "fuel-ostf_sha": "1f08e6e71021179b9881a824d9c999957fcc7045", "release": "7.0", "fuelmain_sha": "9ab01caf960013dc882825dc9b0e11ccf0b81cb0"}}}, "auth_required": true, "api": "1.0", "fuel-library_sha": "ff63a0bbc93a3a0fb78215c2fd0c77add8dfe589", "nailgun_sha": "5c33995a2e6d9b1b8cdddfa2630689da5084506f", "feature_groups": ["mirantis"], "fuel-nailgun-agent_sha": "d7027952870a35db8dc52f185bb1158cdd3d1ebd", "openstack_version": "2015.1.0-7.0", "fuel-agent_sha": "082a47bf014002e515001be05f99040437281a2d", "production": "docker", "python-fuelclient_sha": "1ce8ecd8beb640f2f62f73435f4e18d1469979ac", "astute_sha": "8283dc2932c24caab852ae9de15f94605cc350c6", "fuel-ostf_sha": "1f08e6e71021179b9881a824d9c999957fcc7045", "release": "7.0", "fuelmain_sha": "9ab01caf960013dc882825dc9b0e11ccf0b81cb0"}