Add and exclude Index instance columns

Exclude inherited columns from the Index models.
Add the label columns to Index instances.

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

mayan/apps/document_indexing/apps.py

@@ -100,17 +100,24 @@ class DocumentIndexingApp(MayanAppConfig):
             model=IndexInstanceNode, related='index_template_node__index'
         )
 
-        SourceColumn(
+        column_index_label = SourceColumn(
             attribute='label', is_identifier=True, is_sortable=True,
             source=Index
         )
+        column_index_label.add_exclude(source=IndexInstance)
         SourceColumn(
+            attribute='label', is_object_absolute_url=True, is_identifier=True,
+            is_sortable=True, source=IndexInstance
+        )
+        column_index_slug = SourceColumn(
             attribute='slug', is_sortable=True, source=Index
         )
-        SourceColumn(
+        column_index_slug.add_exclude(IndexInstance)
+        column_index_enabled = SourceColumn(
             attribute='enabled', is_sortable=True, source=Index,
             widget=TwoStateWidget
         )
+        column_index_enabled.add_exclude(source=IndexInstance)
 
         SourceColumn(
             func=lambda context: context[

mayan/apps/document_indexing/views.py

@@ -278,6 +278,7 @@ class IndexListView(SingleObjectListView):
 
     def get_extra_context(self):
         return {
+            'hide_object': True,
             'hide_links': True,
             'no_results_icon': icon_index,
             'no_results_main_link': link_index_template_create.resolve(