Refactor repository_storages_options_for_select

app/helpers/application_settings_helper.rb

@@ -96,12 +96,12 @@ module ApplicationSettingsHelper
     ]
   end
 
-  def repository_storages_options_for_select
+  def repository_storages_options_for_select(selected)
     options = Gitlab.config.repositories.storages.map do |name, storage|
       ["#{name} - #{storage['path']}", name]
     end
 
-    options_for_select(options, @application_setting.repository_storages)
+    options_for_select(options, selected)
   end
 
   def sidekiq_queue_options_for_select

app/views/admin/application_settings/_form.html.haml

@@ -537,7 +537,8 @@
     .form-group
       = f.label :repository_storages, 'Storage paths for new projects', class: 'control-label col-sm-2'
       .col-sm-10
-        = f.select :repository_storages, repository_storages_options_for_select, {include_hidden: false}, multiple: true, class: 'form-control'
+        = f.select :repository_storages, repository_storages_options_for_select(@application_setting.repository_storages),
+          {include_hidden: false}, multiple: true, class: 'form-control'
         .help-block
           Manage repository storage paths. Learn more in the
           = succeed "." do