FIX: use customOptions property (#240)

diff --git a/assets/javascripts/discourse-assign/connectors/advanced-search-options-below/assigned-advanced-search.hbs b/assets/javascripts/discourse-assign/connectors/advanced-search-options-below/assigned-advanced-search.hbs
index ccc7688..809426a 100644
--- a/assets/javascripts/discourse-assign/connectors/advanced-search-options-below/assigned-advanced-search.hbs
+++ b/assets/javascripts/discourse-assign/connectors/advanced-search-options-below/assigned-advanced-search.hbs
@@ -8,7 +8,7 @@
         maximum=1
         excludeCurrentUser=false
         includeGroups=true
-        assignableGroups=true
+        customSearchOptions=(hash assignableGroups=true)
       )
     }}
   </div>
diff --git a/assets/javascripts/discourse/templates/modal/assign-user.hbs b/assets/javascripts/discourse/templates/modal/assign-user.hbs
index 96dcbb5..37e4ad5 100644
--- a/assets/javascripts/discourse/templates/modal/assign-user.hbs
+++ b/assets/javascripts/discourse/templates/modal/assign-user.hbs
@@ -10,7 +10,7 @@
         placementStrategy="absolute"
         filterPlaceholder=placeholderKey
         includeGroups=true
-        assignableGroups=true
+        customSearchOptions=(hash assignableGroups=true)
         groupMembersOf=allowedGroups
         maximum=1
         autofocus=autofocus

GitHub sha: 89a61b58f879069a407ab3781b7144cffe5b9ff2

This commit appears in #240 which was approved by eviltrout. It was merged by SamSaffron.