Make the site contact a drop down of admin users

config/locales/server.en.yml

@@ -3266,8 +3266,8 @@ en:
             label: "Contact URL"
             placeholder: "http://www.example.com/contact-us"
             description: "Will be displayed on your \"About\" page."
-          site_contact_username:
-            label: "Site Contact Username"
+          site_contact:
+            label: "Site Contact"
             description: "All automated messages will be sent from this user."
 
       corporate:

lib/wizard/builder.rb

@@ -56,10 +56,16 @@ class Wizard
       @wizard.append_step('contact') do |step|
         step.add_field(id: 'contact_email', type: 'text', required: true, value: SiteSetting.contact_email)
         step.add_field(id: 'contact_url', type: 'text', value: SiteSetting.contact_url)
-        step.add_field(id: 'site_contact_username', type: 'text', value: SiteSetting.site_contact_username)
+
+        username = SiteSetting.site_contact_username
+        username = Discourse.system_user.username if username.blank?
+        contact = step.add_field(id: 'site_contact', type: 'dropdown', value: username)
+
+        User.where(admin: true).pluck(:username).each {|c| contact.add_choice(c) }
 
         step.on_update do |updater|
-          updater.apply_settings(:contact_email, :contact_url, :site_contact_username)
+          updater.apply_settings(:contact_email, :contact_url)
+          updater.update_setting(:site_contact_username, updater.fields[:site_contact])
         end
       end
 

spec/components/step_updater_spec.rb

@@ -70,7 +70,7 @@ describe Wizard::StepUpdater do
       updater = wizard.create_updater('contact',
                                       contact_email: 'eviltrout@example.com',
                                       contact_url: 'http://example.com/custom-contact-url',
-                                      site_contact_username: user.username)
+                                      site_contact: user.username)
 
       updater.update
       expect(updater).to be_success