Add-ons Report Improvements by Xon 2.20.6

• Fix installer would throw an error if a report for a post had it's thread hard-deleted
• Fix new report comments alert where not fully anonymized when Alert Improvements was installed
• Fix reaction alerts for report comments could be partially anonymized when they shouldn't

• Improve warning search results appearance to correctly attribute who the warning is for, and who issued it
• Fix warning search not finding records as expected.
  • Requires rebuilding search index for the Warnings content type to fix bad search references.
    Does not require a full-reindex of everything.

• Fix searching reports from NixFifty's Tickets by category