Merge branch 'MAGETWO-96394' into 2.2-develop-pr12

Author: serhii-balko

app/code/Magento/Sales/Test/Mftf/Test/AdminAbleToShipPartiallyInvoicedItemsTest.xml

@@ -69,6 +69,7 @@
         <scrollTo selector="{{AdminInvoiceItemsSection.itemQtyToInvoice('1')}}" stepKey="scrollToItemsInvoiced"/>
         <!--Change invoiced items count-->
         <fillField selector="{{AdminInvoiceItemsSection.itemQtyToInvoice('1')}}" userInput="5" stepKey="invoiceHalfTheItems"/>
+        <waitForElementChange selector="{{AdminInvoiceItemsSection.updateQty}}" function="function($el) {return $el->isEnabled();}" stepKey="waitForUpdateQtyButtonEnabled"/>
         <click selector="{{AdminInvoiceItemsSection.updateQty}}" stepKey="updateQtyToBeInvoiced"/>
         <waitForLoadingMaskToDisappear stepKey="waitForQtyToUpdate"/>
         <waitForElementVisible selector="{{AdminInvoiceMainActionsSection.submitInvoice}}" stepKey="waitforSubmitInvoiceBtn"/>