Merge pull request #366 from magento-folks/bugs

Bugs:
MAGETWO-58067 [GitHub]Data loss for countries multiselect on backend on website level
MAGETWO-57992 Reloading page on checkout causes shipping method to go "undefined" - for mainline
MAGETWO-57842 [FT] Wrong selector for Allow Gift Options for items in Shopping Cart in CheckoutWithGiftMessagesTest
MAGETWO-55380 Information hint block for Zip/Postal Code should NOT block request for available shipping solution
MAGETWO-56814 Unable to print Invoices and Credit memo from Sales>Orders