WooCommerce Product Search 6.1.0

* Fixed product category filter expansion not always behaving properly on touch enabled devices.
* Fixed cycling between expanded and retracting on hover in the product category filter in certain conditions.

* Improved adaptive category filtering to reduce the terms offered when taxonomy pages are requested directly.
* Fixed the filter removal invocation for the terms_clauses filter.
* Fixed an issue where menu items would not be shown when accessing a filter-based URL.
* Fixed a PHP Notice when no results are matching for filters but no search terms were provided.
* Fixed price range filter was not activated due to missing flag in the filter request URL when a category was chosen after setting the price range.
* Added the woocommerce_product_search_request_search_query filter.
* Extended the term count adjustments to product attributes.
* Renamed the get_terms_for_request() method to the more appropriate get_product_categories_for_request() (in the service class).

2018.04.26 - version 2.1.1
* Added the Woo header tag.

2018.04.18 - version 2.1.0
* Improved the product filter navigation and UX.
* Improved term handling internally.
* Added product category navigation facilities compatible with click and touch devices, including auto-expand and retract and click to expand/retract.
* Added visual improvements on all product filters.
* Added Font Awesome 5 Free for term navigation icons.
* Disabled product category filter parent navigation display by default in favor of ancestor navigation which is enabled by default (both can be combined).
* Added guards for cases where conflicts are created by poor "optimizers" or where plain Javascript errors are causing required resources (our typeWatch) not to be loaded.
* Added the woocommerce_product_search_term_walker_expand filter.
* Added the woocommerce_product_search_term_walker_retract filter.
* Improved the term filter algorithm to further restrict terms offered based on matching products from the keyword search filter.
* Removed the previous taxonomy renderer.
* Fixed an issue where applying filters with pagination would lead to 404 responses if the filter would produce less pages than the n-th page viewed.
* Fixed wrong form id produced for price filter form.
* Added the WPS_DEBUG_DOM constant which enables logging of DOM parsing errors.