UsersSelect is part of filter so I rather keep js executed in partial

app/assets/javascripts/dispatcher.js.coffee

@@ -107,13 +107,6 @@ class Dispatcher
             new NamespaceSelect()
       when 'dashboard'
         shortcut_handler = new ShortcutsDashboardNavigation()
-        switch path[1]
-          when 'issues', 'merge_requests'
-            new UsersSelect()
-      when 'groups'
-        switch path[1]
-          when 'issues', 'merge_requests'
-            new UsersSelect()
       when 'profiles'
         new Profile()
       when 'projects'

app/views/shared/issuable/_filter.html.haml

@@ -64,6 +64,8 @@
           = button_tag "Update issues", class: "btn update_selected_issues btn-save"
 
 :coffeescript
+  new UsersSelect()
+
   $('form.filter-form').on 'submit', (event) ->
     event.preventDefault()
     Turbolinks.visit @.action + '&' + $(@).serialize()