fixed wc_get_customer_available_downloads() query, closes #6057
Set simplify user agent
Allow extensions to hijack i18n_product_type_alert
Added Nepali Currency and Symbol.
Tab index fix for PYG Currency and Symbol.
Added Lao Kip Currency
Added actions before and after all available downloads

For `my-downloads.php` template file
Simplfy typo
updated the .pot files
stopped deprecated warnings about like_escape() function since WP 4.0
options.include for makepot admin task

Added an `includes` option for the `makepot` task to specify which files should be scanned.
`grunt-wp-i18n` has now support for [options.include](https://github.com/blazersix/grunt-wp-i18n#optionsinclude)
Updated grunt-wp-i18n to 0.4.7 to support options.include
fixed the paypal process_refund() method
added sandbox support for paypal transaction url
Added paypal refund reason/note

cc @mikejolley
get_category_parents can still be used for #6055
Rewrote old JS to jQuery and allow usage of multiple product categories widgets on one page
Extend REST API to access also hidden order item meta
Fixed jQuery call
Implemented more general filter array