Redesign forms, verify link ownership with rel="me" (#8703)

* Verify link ownership with rel="me"

* Add explanation about verification to UI

* Perform link verifications

* Add click-to-copy widget for verification HTML

* Redesign edit profile page

* Redesign forms

* Improve responsive design of settings pages

* Restore landing page sign-up form

* Fix typo

* Support <link> tags, add spec

* Fix links not being verified on first discovery and passive updates

app/views/invites/_form.html.haml

@@ -1,9 +1,11 @@
 = simple_form_for(@invite, url: controller.is_a?(Admin::InvitesController) ? admin_invites_path : invites_path) do |f|
   = render 'shared/error_messages', object: @invite
 
-  .fields-group
-    = f.input :max_uses, wrapper: :with_label, collection: [1, 5, 10, 25, 50, 100], label_method: lambda { |num| I18n.t('invites.max_uses', count: num) }, prompt: I18n.t('invites.max_uses_prompt')
-    = f.input :expires_in, wrapper: :with_label, collection: [30.minutes, 1.hour, 6.hours, 12.hours, 1.day, 1.week].map(&:to_i), label_method: lambda { |i| I18n.t("invites.expires_in.#{i}") }, prompt: I18n.t('invites.expires_in_prompt')
+  .fields-row
+    .fields-row__column.fields-row__column-6.fields-group
+      = f.input :max_uses, wrapper: :with_label, collection: [1, 5, 10, 25, 50, 100], label_method: lambda { |num| I18n.t('invites.max_uses', count: num) }, prompt: I18n.t('invites.max_uses_prompt')
+    .fields-row__column.fields-row__column-6.fields-group
+      = f.input :expires_in, wrapper: :with_label, collection: [30.minutes, 1.hour, 6.hours, 12.hours, 1.day, 1.week].map(&:to_i), label_method: lambda { |i| I18n.t("invites.expires_in.#{i}") }, prompt: I18n.t('invites.expires_in_prompt')
 
   .fields-group
     = f.input :autofollow, wrapper: :with_label

app/views/invites/index.html.haml

@@ -6,7 +6,7 @@
 
   = render 'form'
 
-  %hr/
+  %hr.spacer/
 
 %table.table
   %thead