Move indexin widgets to the html_widget.py module

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

HISTORY.rst

@@ -80,6 +80,8 @@
 * Add dependencies app
 * Convert the document tags widget to use HTML templates.
 * Move Tag app HTML widgets to their own module.
+* Move the document index app widgets to the html_widget.py
+  module.
 
 3.1.11 (2019-04-XX)
 ===================

docs/releases/3.2.rst

@@ -112,6 +112,8 @@ Other changes
 * Add dependencies app
 * Convert the document tags widget to use HTML templates.
 * Move Tag app HTML widgets to their own module.
+* Move the document index app widgets to the html_widget.py
+  module.
 
 Removals
 --------

mayan/apps/document_indexing/apps.py

@@ -23,6 +23,9 @@ from .handlers import (
     handler_index_document, handler_remove_document,
     handler_post_save_index_document
 )
+from .html_widgets import (
+    get_instance_link, index_instance_item_link, node_level
+)
 from .links import (
     link_document_index_list, link_index_main_menu, link_index_setup,
     link_index_setup_create, link_index_setup_document_types,
@@ -39,7 +42,6 @@ from .permissions import (
     permission_document_indexing_rebuild, permission_document_indexing_view
 )
 from .queues import *  # NOQA
-from .widgets import get_instance_link, index_instance_item_link, node_level
 
 
 class DocumentIndexingApp(MayanAppConfig):

mayan/apps/document_indexing/views.py

@@ -17,6 +17,7 @@ from mayan.apps.documents.permissions import permission_document_view
 from mayan.apps.documents.views import DocumentListView
 
 from .forms import IndexTemplateFilteredForm, IndexTemplateNodeForm
+from .html_widgets import node_tree
 from .icons import icon_index
 from .links import link_index_setup_create
 from .models import (
@@ -30,7 +31,6 @@ from .permissions import (
     permission_document_indexing_view
 )
 from .tasks import task_rebuild_index
-from .widgets import node_tree
 
 
 # Setup views