Some fixes for Czech translation

* Close HTML tags correctly
* Fix the plural forms expression
* Remove excess placeholder
since we are running our own passwd reset facility, we should allow other plugins to validate the password before resetting it.
Merge pull request #3943 from SergeyBiryukov/master

Some fixes for Czech translation
fixing norwegian typo with {order_date}
Refactor coupon code so coupons get the actual discount amount, redone edit coupon screen with tabs, added coupon item limits which Closes #3902
Merge pull request #3947 from BFTrick/fix-norwegian-translation-master

Fixing Norwegian Typo on Master
CH postcode validation
added BR postcode validation
fixed is_postcode method description
fixed the BR postcode validation
refixed the BR postcode validation
Merge pull request #3949 from claudiosmweb/BR_postcode_validation

BR postcode validation
Fix: Download permissions not granted on order completion.

$downloads was being built from a function that tried to read from the permissions table and not from the correct post meta which it actually needed. This resulted in having to manually grant permissions for each order made.

Original symptom was download links not appearing on order completion screen or completion e-mail.
Fix vendor prefix typo. Resolved #3953
Merge pull request #3957 from scottbasgaard/master

Fix vendor prefix typo. Resolves #3953
Pass index to woocommerce_save_product_variation
Merge pull request #3956 from atomworks/master

Fix: Download permissions not granted on order completion.
remove_ordering_args from .18
cast $tabs['class'] as array
Changed id for payment_method_$gateway from <input> to <li>

Changed CSS ID for payment_method_$gateway from radio button to <li> container. This allows to apply custom CSS style for all elements of gateways. And not only to radio button (that has no sense).