0.10.21 - Fixes various reported bugs

[KSJaay]

Summary

Various bugs were reported in the Discord server by toxykaubleu. This PR fixes all the issues reported.

Ended up optimising some of the indexes and responses seem to have improved by around `30%-50%.

Updates

• Incident header shows Archive and Delete even when not incident is displayed
• Avatar URL regex has been cut down to check it starts with http:// and https:// for the time being
• Fixed issue that didn't allow Custom HTML to be added to the status page
• Updated bugs with monitor info
• "Cert expiry" tab removed for ping, push and docker monitors
• User wasn't being created as owner when setting up the application
• Fixed new incident modal when more than 10 monitors are displayed
• Removes unused indexes
• Optimises indexes