check if offset exists in breadcrumb.php

Closes #6878
Change structure of check to appease claudio
Merge pull request #6879 from bryceadams/patch-6878

check if offset exists in breadcrumb.php
Fixed checkbox label in woocommerce_form_field() function, closes #6880
Introduced 'woocommerce_reports_taxes_tax_rate' and 'woocommerce_reports_taxes_rate' filters.
stray console.log
Merge pull request #6884 from helgatheviking/master

stray console.log
sale schedule. closes #6865
Removed eXtremeGoHorse practices from WC_AJAX::calc_line_taxes() and wc_save_order_items()

cc @barrykooij
Merge branch 'master' of github.com:woothemes/woocommerce
Fixed docblock for WC_Product::get_categories()
Added more time for scrutinizer wait for code coverage