Add a patch for snippet chooser autocomplete

patches/hack-snippets-chooser-to-use-autocomplete.patch

@@ -0,0 +1,29 @@
+From d1f371bdcb803d06447999e1cf3e934da9297168 Mon Sep 17 00:00:00 2001
+From: Donald Buczek <buczek@molgen.mpg.de>
+Date: Tue, 19 Nov 2019 15:27:16 +0100
+Subject: [PATCH] Hack snippets chooser to use autocomplete
+
+Users wanted to have partial search when Contacts are selected by the
+Chooser. The Chooser doesn't have the feature to use partial matches and
+our postgres_search doesn't support it in its search() method anyway.
+Try to get away with changing the Chooserd to use autocomplete().
+---
+ lib/python3.7/site-packages/wagtail/snippets/views/chooser.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/python3.7/site-packages/wagtail/snippets/views/chooser.py b/lib/python3.7/site-packages/wagtail/snippets/views/chooser.py
+index adffdef..74de073 100644
+--- a/lib/python3.7/site-packages/wagtail/snippets/views/chooser.py
++++ b/lib/python3.7/site-packages/wagtail/snippets/views/chooser.py
+@@ -34,7 +34,7 @@ def choose(request, app_label, model_name):
+             search_query = search_form.cleaned_data['q']
+
+             search_backend = get_search_backend()
+-            items = search_backend.search(search_query, items)
++            items = search_backend.autocomplete(search_query, items)
+             is_searching = True
+
+     else:
+-- 
+2.22.0
+