👾 Updated uptime monitoring to now again change check intervals d...

👾 Updated uptime monitoring to now again change check intervals depending on the site status, add info on what check period it's currently on. Also you can now pause and resume a check once again. Also changed the behaviour of check intervals when a site goes down — it'll check every 5 minutes instead of every minute to avoid false positives (this is a good compromise).

🧹📖 Updated the documentation about uptime monitoring giving more details and also IP addresses that should be whitelisted if you're using a firewall in front of your site (and the monitor is being blocked).

More to come and do :)