Additions:
- Added '/fish update' (see notes below)

General Changes:
- Modified the default fish.yml

Fixes:
- Fixed fish with the 'SellPriceOverride' not counting towards the Special Fish category.
- Fixed off-hand fishing disable not allowing any items in the off-hand to work while fishing.
- Fixed the per-codex menus redirecting back to the main menu instead of the codex main page.

--------

Important information regarding /fish update.

- The command will not work on scaled or weighed fish. These must be sold instead.
- If your old fish also have a modified sell price, this will set them to the current price for that fish/tier. Meaning you could lose money as well.
- This command has a 30 second cooldown to make sure this cannot be abused. This cooldown cannot be removed or lowered.