[WB] Roll up elements (down arrows) remove block instead of hide it

[Anastasia Kuznetsova]

Steps to reproduce:
1. Go to Mistral Create Workbook tab
2. Click on "Add Action" button (or on "Add Workflow")
3. Click on the down arrow near the name of added element

Expected result:
Block with added element will be rolled up

Observed result:
Block was removed

If we take a look at source code, we will see following:
<a href="#" ng-click="onRemove()"><i ng-show="removable" class="fa fa-times-circle pull-right"></i></a>

[Timur Sufiev (tsufiev-x)]

Yeah, a nasty one :(. Perhaps implementation of bug 1411636 would help to deal with it.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/177809
Committed: https://git.openstack.org/cgit/stackforge/merlin/commit/?id=e5b8fb8a3acc0855ab7486536d9f9eb01a4b22b0
Submitter: Jenkins
Branch: master

commit e5b8fb8a3acc0855ab7486536d9f9eb01a4b22b0
Author: Timur Sufiev <email address hidden>
Date: Mon Apr 27 17:59:38 2015 +0300

    Rewrite <panel> and <collapsible-group> directives

    Use 'collapse' directive from angular-bootstrap inside them instead of
    hand-written bootstrap css transitions. Clicking on panel title no
    longer collapses/expands panel contents - this is done in order enable
    panel entity name in-line editing in next commit.

    Change-Id: Ifcc32cd74a5482a59b417333824522ebf48c73b5
    Closes-Bug: #1411636
    Closes-Bug: #1428719