Add sorting by username, creation and last activity in moderation view (#13076)

* Add ability to order accounts in moderation view

* Display last status date in “Most recent activity” for remote users

app/views/admin/accounts/_account.html.haml

@@ -11,6 +11,8 @@
   %td
     - if account.user_current_sign_in_at
       %time.time-ago{ datetime: account.user_current_sign_in_at.iso8601, title: l(account.user_current_sign_in_at) }= l account.user_current_sign_in_at
+    - elsif account.last_status_at.present?
+      %time.time-ago{ datetime: account.last_status_at.iso8601, title: l(account.last_status_at) }= l account.last_status_at
     - else
       \-
   %td

app/views/admin/accounts/index.html.haml

@@ -19,6 +19,12 @@
     %ul
       %li= filter_link_to t('admin.accounts.moderation.all'), staff: nil
       %li= filter_link_to t('admin.accounts.roles.staff'), staff: '1'
+  .filter-subset
+    %strong= t 'generic.order_by'
+    %ul
+      %li= filter_link_to t('relationships.most_recent'), order: nil
+      %li= filter_link_to t('admin.accounts.username'), order: 'alphabetic'
+      %li= filter_link_to t('relationships.last_active'), order: 'active'
 
 = form_tag admin_accounts_url, method: 'GET', class: 'simple_form' do
   .fields-group