WooCommerce Product Add-Ons 7.2.0

* Fix - No respect for the price_trim_zeros filter.
* Fix - Cannot remove labels prior to saving changes.
* Fix - Labels should be required.

* Update - POT file.
* Fix - Display issue when subscription and simple products are combined in shortcodes.
* Fix - Add-ons with negative price (or discounts) do not alter price.
* Fix - PHP 7.1 compatibility notice
* Fix - Line Breaks of a Custom Input add-on not shown in the order details page.

* Fix - When re-ordering, not all addons accounted for.
* Fix - Do not show addon totals before variations have been selected.
* Fix - When removing old global addons after import, all addons disappears.
* Fix - Taxes not calculating correct on display when using {price_including_tax} in price suffix.
* Update - Changed default Grand Total verbiage to Sub total for a more accurate description.
* Update - WC tested up to version.