Add sortable role label column

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/permissions/apps.py

@@ -17,6 +17,7 @@ from mayan.apps.events.links import (
     link_events_for_object, link_object_event_types_user_subcriptions_list
 )
 from mayan.apps.events.permissions import permission_events_view
+from mayan.apps.navigation.classes import SourceColumn
 
 from .events import event_role_created, event_role_edited
 from .handlers import handler_purge_permissions
@@ -61,6 +62,10 @@ class PermissionsApp(MayanAppConfig):
             )
         )
 
+        SourceColumn(
+            attribute='label', is_identifier=True, is_sortable=True, source=Role
+        )
+
         menu_list_facet.bind_links(
             links=(
                 link_acl_list, link_events_for_object,

mayan/apps/permissions/views.py

@@ -148,6 +148,7 @@ class RoleListView(SingleObjectListView):
     def get_extra_context(self):
         return {
             'hide_link': True,
+            'hide_object': True,
             'no_results_icon': icon_role_list,
             'no_results_main_link': link_role_create.resolve(
                 context=RequestContext(request=self.request)