Pass page_url instead of whole request to render

only page url is required to be rendered in template.
move more logic code back to python.

Change-Id: I9f52d030f65084e760f37a439de02b73ef94497f

openstack_dashboard/templates/context_selection/_project_list.html

@@ -1,6 +1,5 @@
 {% load i18n %}
 
-{% with page_url=request.horizon.panel.get_absolute_url %}
 <ul class="dropdown-menu">
   <li class="dropdown-header">{% trans "Projects:" %}</li>
   {% for project in projects %}
@@ -16,4 +15,3 @@
   </li>
   {% endfor %}
 </ul>
-{% endwith %}

openstack_dashboard/templates/context_selection/_region_list.html

@@ -1,11 +1,10 @@
 {% load i18n %}
 
-{% with panel_url=request.horizon.panel.get_absolute_url %}
 <ul class="dropdown-menu">
   <li class="dropdown-header">{% trans "Regions:" %}</li>
   {% for region in regions %}
   <li>
-    <a href="{% url 'switch_services_region' region %}?next={{ panel_url }}" target="_self">
+    <a href="{% url 'switch_services_region' region %}?next={{ page_url }}" target="_self">
       <span class="region-name dropdown-title">{{ region }}</span>
       {% if region == region_name %}
       <span class="fa fa-check"></span>
@@ -14,4 +13,3 @@
   </li>
   {% endfor %}
 </ul>
-{% endwith %}

openstack_dashboard/templatetags/context_selection.py

@@ -85,7 +85,7 @@ def show_project_list(context):
                       key=lambda project: project.name.lower())
     context = {'projects': projects[:max_proj],
                'project_id': request.user.project_id,
-               'request': request}
+               'page_url': request.horizon.get('panel').get_absolute_url()}
     return context
 
 
@@ -98,7 +98,7 @@ def show_region_list(context):
     context = {'region_name': request.user.services_region,
                'regions': sorted(request.user.available_services_regions,
                                  key=lambda x: x.lower()),
-               'request': request}
+               'page_url': request.horizon.get('panel').get_absolute_url()}
     return context