Thread view count 2.0

Thread view count v2.0 changes:

Fixed null condition error.

Thread view count v1.9 changes:

Fixed null condition issue.

Thread view count v1.8 changes:

Fixed issue with race condition causing duplicate entry server error logs.

Thread view count v1.7 changes:

Now works with PHP 7.4.

Thread view count v1.6 changes:

Updated setup to use schema manager.

Thread view count v1.5 changes:

Removed support for legacy upgrade.

Thread view count v1.4 changes:

Packaging problems fixed.