Multi Prefix 2.18.3

• Fix placeholder for prefix selection widget had wrong label for prefix vs prefixes & optional variants

• Compatibility fix for DBTech/eCommerce v5.0.0
• Fix Single prefix filtering (all) option would disable users adding multiple prefixes for forums which required multiple prefixes
• Harden max prefix count being greater than min prefix count was not handled the same on all 3 levels it is checked at (front-end enforcement, backend enforcement, edit forum node behavior)
• Fix prefix help blob could be rendered twice on the edit thread form and also fail to be removed on being unselected
• Fix css adjusting rounded corners applied when just the prefix row was rendered
• Add "Render Prefixes selector before title" style property (default true)
• Add "Show "(no prefix)" on edit form when prefixes are optional" style property (default true)
• When a prefix selection form does not have a minimum number of required prefixes the placeholder is now "optional prefixes..." instead of "prefixes...".
  Note; This uses the phrase svMultiPrefix_optional_prefixes

• Fix javascript error when changing prefixes when editing the first post of a thread on XF2.3+

• Fix missing whitespace between thread title and prefix on thread view when "Move thread prefixes location" style property is set to "Right-aligned suffix" w

• Fix moving prefix list to the suffix lacked a space between the title and any prefixes
• Fix thread view would have an empty <li> element in the sub-title position if a thread had no prefixes and prefixes moved to the sub-title

• Fix missing refresh_prefix.min.js file

• Compatibility update for upcoming Content Ratings v2.9.0+

• Require StandardLib v1.23.0+
• Fix prefix usage help could cause javascript errors on customized template usage
• Fix prefix usage help may not be escaped properly when rendered into HTML
• Fix editing the first post of a thread did not respect the "Move thread prefixes location" style property, and would cause duplicate prefixes to show up after editing
• Allow RSS feeder to create threads with a given set of prefixes no matter the forum configuration (ie min/max prefix count)
• Add MultiPrefixable::updateOptions helper method to make manipulating MultiPrefixable's options saner, and use constants instead of magic strings.
• Add MultiPrefixable::OPTION_SkipPrefixValidation option to disable prefix validation entirely for automation purposes
• Add style property Move prefix in page title to end (default: false)
• Add Custom user field for per-user thread prefix location option.
  Allows per-user adjustment of the "Move thread prefixes location" style property.
  Recommended to be a radio button custom field with the following option values: none/prefix/subtitle/suffix

• Update installer to better handle very large number of threads upgrading

• Require StandardLib v1.22.0+
• Improvements & work-around when filtering by prefixes on forums with very large number of threads
  • Add fast-path mode when only filtering by a single prefix
  • Reduce query complexity when filtering by multiple prefixes. Still more expenisve than single prefix filtering
  • Add options Single prefix filtering (all) (default false) and Single prefix filtering (for guests or robots) (default false)
    • Disables multi-prefix filtering, this is a performance optimization for forums with very large number of prefixed threads.