Make storing and displaying application used to toot opt-in

app/views/settings/preferences/show.html.haml

@@ -34,6 +34,9 @@
   .fields-group
     = f.input :setting_hide_network, as: :boolean, wrapper: :with_label
 
+  .fields-group
+    = f.input :setting_show_application, as: :boolean, wrapper: :with_label
+
   - unless Setting.hide_followers_count
     .fields-group
       = f.input :setting_hide_followers_count, as: :boolean, wrapper: :with_label

app/views/stream_entries/_detailed_status.html.haml

@@ -39,7 +39,7 @@
     = link_to TagManager.instance.url_for(status), class: 'detailed-status__datetime u-url u-uid', target: stream_link_target, rel: 'noopener' do
       %time.formatted{ datetime: status.created_at.iso8601, title: l(status.created_at) }= l(status.created_at)
     ·
-    - if status.application
+    - if status.application && @account.user&.setting_show_application
       - if status.application.website.blank?
         %strong.detailed-status__application= status.application.name
       - else