* New: Wombat product addons integration.
* Fix: Return "default" template option in the product settings.
* Fix: Return activation message.
* Fix: CSS fixes.
* Enhance: Add regular price, sale price, discount and pricing type fields to the WP All Import role base import options.
* Enhance: Allow quantity to be 0 on the cart.
* Fix: Do not remove "step" attribute from qty field when variation is reset - some there use it to make +\- buttons work.
* Update: Increase performance by do not check each child of variable product for tiered pricing on product page load.
* Update: Remove "product has no rules" checkbox from variable product advanced settings.
* Fix: Issue when global pricing rules didn't save tiered pricing applying type. (mix&match or individual)
