https://fedorahosted.org/freeipa/ticket/4286

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

https://fedorahosted.org/freeipa/ticket/4286

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

Into:
* ActionMixin
* HeaderMixin

It is supposed to be used as a mixin classes to facet.Facets. In long
term it should replace/serve as a base class for facet.facet.

e.g:
var SomeFacet = declare([Facet, ActionMixin, HeaderMixin], {
	foo: function() {}
});

Then following spec can be used:

some_facet_spec = {
    name: 'some',
    label: 'Some Facet',
    tab_label: 'Some Facet',
    facet_groups: [foo.bar_facet_group],
    facet_group: 'search',
    actions: ['refresh'],
    control_buttons: [
        {
            name: 'refresh',
            label: '@i18n:buttons.refresh',
            icon: 'fa-refresh'
        }
    ],
	header_actions: [refresh]
};

reg.facet.register({
    type: 'some',
    ctor: SomeFacet,
    spec: some_facet_spec
});

prerequisite for: https://fedorahosted.org/freeipa/ticket/4286

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

So that facet.simple_facet_header could be used even in pages without
entity structure - e.g. future topology graph.

prerequisite for: https://fedorahosted.org/freeipa/ticket/4286

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

Reviewed-By: Martin Basti <mbasti@redhat.com>

Reviewed-By: Martin Basti <mbasti@redhat.com>

First part of API browser - displaying metadata in more consumable way.

https://fedorahosted.org/freeipa/ticket/3129

Reviewed-By: Martin Kosek <mkosek@redhat.com>
Reviewed-By: Tomas Babej <tbabej@redhat.com>

https://fedorahosted.org/freeipa/ticket/4997

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

refactoring for:
https://fedorahosted.org/freeipa/ticket/4997

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

Reviewed-By: David Kupka <dkupka@redhat.com>
Reviewed-By: Thierry Bordaz <tbordaz@redhat.com>