Add help text and confirmation for disabling 2FA

app/views/settings/_security.haml

@@ -28,5 +28,5 @@
             = f.hidden_field :otp_secret_key, value: current_user.otp_secret_key
             = f.submit t('views.actions.save'), class: 'btn btn-primary'
     - else
-      %p= t('views.settings.security.2fa.enabled_hint')
-      = link_to t('views.actions.remove'), destroy_user_2fa_path, :class => 'btn btn-primary', :method => 'delete'
+      %p Your account is set up to require the use of a one-time password in order to log in
+      = link_to t('views.actions.remove'), destroy_user_2fa_path, :class => 'btn btn-primary', :method => 'delete', :data => { confirm: "Are you sure you want to disable two-factor authentication?" }