Enable breadcrumbs for AngularIndexView

This patch enables breadcrumb navigation for panels using
horizon.browsers.views.AngularIndexView.

Closes-Bug: #1664374
Change-Id: If6d100472e61c1cb00e18c56e25300b45d8a7098
(cherry picked from commit 21e3d07644)

horizon/browsers/views.py

@@ -60,10 +60,26 @@ class ResourceBrowserView(MultiTableView):
 
 
 class AngularIndexView(generic.TemplateView):
+    '''View for Angularized panel
+
+    title: to display title for browser window or tab.
+    page_title: to display current position in breadcrumb.
+
+    Sample usage is as follows.
+    from horizon.browsers import views
+    views.AngularIndexView.as_view(title="Images")
+    views.AngularIndexView.as_view(title="Browser Title",
+                                   page_title="Page Title")
+    '''
     template_name = 'angular.html'
     title = _("Horizon")
+    page_title = None
 
     def get_context_data(self, **kwargs):
         context = super(AngularIndexView, self).get_context_data(**kwargs)
         context["title"] = self.title
+        if self.page_title is None:
+            context["page_title"] = self.title
+        else:
+            context["page_title"] = self.page_title
         return context

openstack_dashboard/templates/angular.html

@@ -2,8 +2,6 @@
 {% load i18n %}
 {% block title %}{{ title }}{% endblock %}
 
-{% block breadcrumb_nav %}{% endblock %}
-
 {% block page_header %}
 {% endblock %}