Merge branch 'hotfix/1.3.1'

Author: wuyue92tree

.gitattributes

@@ -0,0 +1,2 @@
+*.html linguist-language=python
+*.js linguist-language=python

adminlteui/__init__.py

@@ -1,2 +1,2 @@
-version = '1.3.0'
+version = '1.3.1'
 default_app_config = 'adminlteui.apps.AdminlteUIConfig'

adminlteui/admin.py

@@ -237,7 +237,9 @@ def exchange_menu_view(self, request):
                 use_custom_menu = Options.objects.get(
                     option_name='USE_CUSTOM_MENU')
             except Options.DoesNotExist:
-                use_custom_menu = None
+                use_custom_menu = Options.objects.create(
+                    option_name='USE_CUSTOM_MENU', option_value='0'
+                )
 
             if not use_custom_menu or use_custom_menu.option_value == '0':
                 use_custom_menu.option_value = '1'