WooCommerce Product Bundles 8.1.2

* Fix - Typos in "Group Mode" admin notice text.
* Fix - Invalidate 'bundled_data_items' cache when clearing bundled item stock meta.
* Fix - Escaped attributes in '/templates/single-product/bundled-product-variable.php'.
* Fix - Prevent incorrect display/use of unsupported-type bundled items.
* Fix - Strengthened back-end add-to-cart validation of variable bundled product attributes.
* Tweak - Assign priority to 'Product Data > Bundled Products' tab.
* Tweak - Reduced number of DB queries used to fetch product data when calling 'WC_Product_Bundle::get_bundled_items'.

* Fix - Fatal "return value in write context" error, affecting systems running outdated versions of PHP.

2017.10.18 - version 5.5.1
* Fix - Failing test when 'woocommerce_bundled_item_has_bundled_weight' filter is in use.

2017.10.14 - version 5.5.0
* Important - WooCommerce 2.X support dropped.
* Important - WooCommerce 3.2 support added.
* Important - Template 'bundle-add-to-cart-wrap.php' introduced to allow moving the add-to-cart button section to the top without modifying the 'bundle.php' template. If you are overriding the 'bundle.php' template, please review and update your customizations!
* Important - Dropped support for WooCommerce Product Add-Ons versions older than 2.9.0.
* Feature - New "Group mode" option. Use "Group mode" to modify the visibility and indentation of parent/child line items in cart/order templates. Developers refer to 'WC_Product_Bundle::get_group_mode_options_data'.
* Feature - Editable bundled cart item quantities.
* Feature - Added product page links to bundled item titles. Displayed if the bundled product is visible in the catalog.
* Feature - New "Product Bundles - Top Add to Cart Button" mini-extension. Grab it at GitHub - somewherewarm/woocommerce-product-bundles-top-add-to-cart-button: WooCommerce Product Bundles mini-extension that adds an extra add-to-cart button section at the top of bundle-type pages..
* Feature - UX: Include bundled product titles in "choose options" single-product notices.
* Fix - Revised integration with "WooCommerce Print Invoices and Packing Lists" based on real world accounting, shipping and fulfillment requirements. Assembled and unassembled bundles are now displayed in Invoices, Packing Lists and Pick Lists correctly. Packing Lists -- Each assembled bundle is now listed as one physical item to resolve item weight/count mismatches between packing lists and physical shipments. Invoices -- Bundled line item subtotals are no longer aggregated for accounting accuracy (e.g. different tax rates). Pick Lists -- Bundled items that require assembly are now clearly marked.
* Fix - Bundled products with Product Add-Ons displayed incorrect totals when "Priced Individually" was enabled and a Discount existed. That's now fixed
* Fix - Infinite Ajax loop when displaying bundle-level Product Add-Ons totals.
* Fix - Prevent concurrent edge-case runs of the DB upgrade routine.
* Fix - Bundles containing variable products with pre-selected attribute values can now be added to the cart from shop archives without having to click add-to-cart from the single-product page.
* Tweak - Prevent Product Add-Ons from firing off a server-side request to calculate and display totals incl/excl tax. Do it on the client-side instead.
* Tweak - Price filter widget meta queries are no longer filtered for performance reasons. Due to WooCommerce database limitations, price filter widget results will now only include bundles if their minimum price is within the searched range. To be revised when WC optimizes its price filter widget DB queries, or switches to a term-based price filtering scheme.
* Tweak - Dropped support for the WooCommerce CSV Import/Export Suite extension. Please use the import/export functionality built-into WooCommerce 3.1+.
* Tweak - Revised the 'i18n_total' and 'i18n_subtotal' strings passed to the front-end script to allow RTL language localizations.
* Tweak - Prevent bundles with an "Insufficient stock" status from showing up in the catalog when the "Out of Stock Visibility" option is set to "Hide out of stock items from the catalog".
* Tweak - Removed the "Units available" column from the "Insufficient stock" report table. If bundled product stock is insufficient, units remaining don't matter anyway.
* Tweak - UX: Show notice when add-to-cart button is clicked and client-side validation fails.
* Tweak - UX: Bundled cart item prices in the Prices column are now aggregated, for consistency with subtotals in the Total column.
* Tweak - UX: Bundled line item prices and subtotals are now prepended with a "carriage return" symbol.
* Tweak - Admnin UX: Moved the "Edit in Cart" checkbox under the "Bundled Products" tab.
* Dev - Introduced 'WC_Product_Bundle::get_bundle_regular_price_{including/excluding}_tax' and 'WC_Product_Bundle::calculate_price' methods.
* Dev - Introduced 'WC_Bundled_Item::get_regular_price_{including/excluding}_tax' and 'WC_Bundled_Item::calculate_price' methods.
* Dev - Moved all display-related cart/order item filters from 'WC_PB_Cart' and 'WC_PB_Order' to 'WC_PB_Display'.
* Dev - New 'woocommerce_bundles_add_to_cart_wrap' action added.
* Dev - Filter 'woocommerce_bundled_table_item_js_enqueued' added. Useful if you want to avoid ugly JS hacks and use plain CSS to indent bundled cart/order line items in your theme.
* Dev - Removed deprecated 'woocommerce_bundled_item_shipped_individually' filter.
* Dev - Deprecated use of 'WC_Product_Bundle::get_bundled_item_quantities' and refactored 'WC_Bundled_Item::get_quantity' arguments for clarity and ease of plugging-in.
* Dev - Refactored 'WC_Product_Bundle' type syncing.
* Dev - Update the 'outofstock' catalog visibility term of product bundles depending on the stock status of bundled items. Note that syncing is done asynchronously for performance reasons. Developers are encouraged to check out the 'WC_PB_DB_Sync' class for details.
* Dev - Introduced 'WC_Product_Bundle::get_bundled_items_stock_status' CRUD method.
* Dev - Disable automatic DB updates via 'woocommerce_bundles_auto_update_db' filter.
* Dev - DB updates powered by WP-CLI: Added 'wc pb update' command.