adding woocommerce_terms_is_checked filter
Make frontend scripts safe to run on non WC pages (check for objects)

For a more detailed explaination of why this is helpful, see
Issue #4202. In short, from a dev ops perspective, if we want to build /
concatonate our front end scripts into a single application.js file, we
need to ensure scripts first check for dependent global object helpers
before trying to use them. For example, there are several objects
(created via PHP using `wp_localize_script`) which generate objects such
as `wc_single_product_params`. These objects will not exist on most
other pages, however these scripts attempt to execute code that
references these objects.
Adding default shipping price to tooltips
Remove $from param on get_price_html_from_text()

As it's not used at all.
Merge pull request #4292 from thenbrent/fix-get_price_html_from_text

Remove `$from` param on `get_price_html_from_text()`
Updated docblocks for #4292
Merge pull request #4291 from BFTrick/flat-rate-shipping-message

Adding Default Shipping Price to Tooltips
Merge pull request #4284 from BFTrick/show-terms-filter

Adding woocommerce_terms_is_checked Filter
Made #4284 added filter a little more descriptive
Merge pull request #4289 from jaredcobb/master

Make frontend scripts safe to run on non WC pages (check for objects)
Minified all the JS files for #4289
Added option to hide Returning customer message. Closes #4220