Add-ons Report Improvements by Xon 2.20.7

• Fix a report's content could sometimes be loaded multiple times instead of just once
• Fix excessive memory usage when viewing a report when many content moderators exist

• Fix post report view permission check would fail if the original forum the report was generated from was deleted
• Fix approval queue 'report content' feature did not check the content was viewable before checking if the content could be reported.
• Fix unexpected approval queue rebuilds when it isn't required.

• Fix displaying points for a deleted warning in the reports comments
• Fix approval queue counts would be recomputed every time the approval queue was viewed
• Fix reports would be incorrectly fetched when recomputing approval queue counts
• Fix N+1 query behavior when adding reports to approval queue items