Implement order_by option in SQL Alchemy QueryAjaxModelLoader

Fix nullable enums and allow blanks in editable list view select fields

This is to support offset() with Microsoft SQL Server.

Fixes #908. Ensure optional field (list of references) can be empty on form.

fix xss vulnerability - escape html in column_editable_list values

Allow overriding page_size in get_list

Improve Norwegian and German Translations

Make it possible to override return url after form has been saved

Based on suggestion from Paul Brown (pawl):
https://github.com/flask-admin/flask-admin/issues/985

Redirecting to details page after create/edit (v3)

Fix bug with details view tab.

Hide create button in edit_view unless user has permission

Hide create button in details view unless can_create=True

use lazy_gettext with pymongo filters

Fix SQLAlchemy hybrid_property support, add example and test