xF2 Add-on [FF] Classifieds Enhancements (+ Fixes) 1.1.4

A few useful extensions for NixFifty's Classifieds system - as well as any bug fixes that I spotted.

Require prefix
Adds a new option in the category edit page to require a prefix for posted items.

Linked prefixes
Link a classifieds prefix to a thread prefix - so the created thread can use the classifieds prefix, rather than just the category.

Prefix filter under category
List all the prefixes under each category in the navigation block that have items assigned.

(Fiesta and Puma are prefixes, not categories)

FIX: Carousel image display
Correctly show the right number of items in the carousel (2 on mobile, 3 on everything else)


FIX: Carousel navigation dots
See above image.

FIX: Price input as number instead of text
Solves the issue with people entering "," as a thousand separator

FIX: Widen the left hand column display on wider screens so it's not all squished.