Add missing hyphon between prefix and thread title in page title
Add 5th paramater to template prefix() function 'appendTrailing' to control joining blob between title & prefix, if not set defaults to 4th argument 'append' glue
Include prefix list when saying a prefix can't be removed
Fix errors did not use the prefix's title, and instead had a phrase string
Fix prefix not selecting when switching from a forum which only allows at most 1 prefix and a forum which allows more than 1 prefix
Add "Strip unusable prefixes" option (default true) to control how individual content's move command handles moving where prefixes are not permitted to be used
Fix old feed entries not correctly generating threads with prefixes
Support rebuilding thread<->prefix links using the "Rebuild threads" option, also rebuild thread/prefix link on various operations which rebuild thread counters
Aggregating Forums compatibility fix for filtering by a child forum and a prefix from that child forum