[XB] Buy Tag 2.0.0 Patch Level 2

Avoid XF search indexing errors when index data is null

XF 2.3 support
Added missing alert preferences option phrase

2.0.0 Beta:

This is a beta release. Strongly recommended to test it on local copy or take a full backup before upgrading from older versions on a production site.

Changelog:

• General code & database schema refactor
• Improved multiple content association support (potentially for future addons integrations)
• Minimal XF version increased to 2.2
• Added stats handlers
• Reworked "My content hide purchases" and "purchases for my content hides" pages and moved to account tab
• Improved purchase alerts to content author
• Cached some phrases to avoid unnecessary database queries
• Fixed PHP 8.x compatibility

This is beta update and may contain issues. Please test it before to use in production.

Changes:

• Added existing tag edit tool
• Added notification about purchases for your hidden content
• Reduced db query amount (to determine purchased contents, and removed redundant queries for tag owner)
• Refactor & code cleanup

Added option to cut physically hidden content from XF's search index

Mark button disabled if purchase limit reached
Fix is creator condition to support XFRM team_user_id

New feature: Limit purchases
Added admin pages with list of hidden content and purchases
Added cron job to remove unassociated hidden contents records
Added option to disable content support

Implemented secondary content association logic, that will allow add compatibility with add-ons that automatically posts contents to thread
Added Xenforo Resource Manager Resource & Update description support
Fixed Post As User compatibility
Properly handle unsupported content error to be able display tag contents in the message preview

Implement better association logic for tag data with content
Support tag usage in profile posts & conversations
Avoid out of range value for column cost_amount
Return correct error if content for this tag is not supported

Added "results on page" option
Display purchase cost & currency on "my purchases" and "purchases for my paid content" pages