Auto temp ban for Admin (backend)

[nhlpl]

Issue?
It is possible to lock superadmin access to the Admin (backend).

Steps to reproduce?
Wait for /admin (backend) to log-out.
Provide wrong superadmin password for many times.
NodeBB locks access to the /admin for superadmin user.

Frontend still works and superadmin can post new topics and replies.
After logging-out superadmin both frontend and backed are locked.

What is expected?
A better control over automatic temp bans (for example showing them in the user info).
Logging-out frontend if temp ban being applied for admin user.
Not sure how it should work for superadmin (uid=1).

Hosted on Alpine Linux edge using Podman v3.0.1
NodeBB v1.17.0-beta.3 is run with Node.js v14.16.0
NodeBB SHA:6e8b1bb9ad9301258b0b061705450255532a78ee
Built with Nobbic v0.5.0
It uses:

• nginx (docker.io/nginx:alpine)
  with NGINX_VERSION=1.19.8 NJS_VERSION=0.5.2
• nodebb (localhost/nodebb:14.16.0-1.17.0-beta.3)
  with NODEBB_VERSION=1.17.0-beta.3 NODE_VERSION=14.16.0 YARN_VERSION=1.22.5
• redis (docker.io/redis:6.2.1-alpine)
  with REDIS_VERSION=6.2.1