feat: user preview, bulk and record actions and the permanent delete

- the list opens the preview, which shows one status hint (banned,
  deactivated, not activated, suspended) and the IP address fields
- bulk actions activate, deactivate, restore, ban and unban; record
  actions activate, unban and unsuspend, offered while they apply
- delete (form button and bulk) removes the user for good with the
  throttle rows, group memberships and attachments in one transaction;
  blobs go after the commit
- a privileged-group member is still refused, a bulk delete as a whole

models/user/fields.yaml

@@ -14,3 +14,15 @@ fields:
         type: text
         span: full
         tab: golem15.user::lang.user.account
+    created_ip_address:
+        label: golem15.user::lang.user.created_ip_address
+        type: text
+        span: left
+        tab: golem15.user::lang.user.account
+        context: preview
+    last_ip_address:
+        label: golem15.user::lang.user.last_ip_address
+        type: text
+        span: right
+        tab: golem15.user::lang.user.account
+        context: preview