Report Improvements by Xon 2.18.3

• Do not create large number of open reports when importing warnings into reports system
• Fix "member function getUser() on null" when removing reply bans
• Fix that a user could be alerted for mention from a report and for a report comment being added at the same time

• Fix possible error during upgrade

• Require XF2.1+, remove XF2.0 support
• Improve reliability of 'mark report resolved on issue a warning' feature
• Fix that some report view checks did not respect the "Can View Report Centre" permission
• Fix that alerts would be repeatedly sent instead of only when there are unread alerts for that report

• Fix disclosure of usernames for user reports when the user can not see report usernames
• Allow users with access to view their name on their own report comments

• Compatibility fix for when issuing a warning with a new Report does not correctly link to the report when Warning Improvement's logging to a thread is setup

• Fix reply-ban from warning config not displaying when issuing a warning

• Compatibility fix with Warning Improvements notify thread behaviour

• Fix typo in report alert phrase
• Fix permanent reply-bans from issuing warnings unexpectedly expiring in an hour
• Fix logging relative URL instead of full url for reply-bans in notes

• Add style properties "Reports - Staff messages" and "Reports - User report messages" to control styling of report comments & user reports

• Work-around for XF bug where a user report always has a state change of 'open'
• Fix comment direction option with XF2.1
• Avoid N+1 query behaviour when viewing reports
• Support alerting the user who has a report assigned to them
  • Track when a user is assigned to a report, in assigned alert report who it is assigned to