Fixed #25384 -- Ordered imports in newly created migration files

Partial forwardport of 3cc5cc79 from
stable/1.8.x as the issue was already fixed in master in
a7bc00e1

docs/releases/1.8.5.txt

@@ -26,3 +26,6 @@ Bugfixes
 
 * Fixed autocompletion for options of non-``argparse`` management commands
   (:ticket:`25372`).
+
+* Alphabetized ordering of imports in ``from django.db import migrations,
+  models`` statement in newly created migrations (:ticket:`25384`).