Merge branch 'API-44275-test' into API-Bug-PR

# Conflicts:
#	app/code/Magento/Checkout/i18n/de_DE.csv
#	app/code/Magento/Checkout/i18n/en_US.csv
#	app/code/Magento/Checkout/i18n/es_ES.csv
#	app/code/Magento/Checkout/i18n/fr_FR.csv
#	app/code/Magento/Checkout/i18n/nl_NL.csv
#	app/code/Magento/Checkout/i18n/pt_BR.csv
#	app/code/Magento/Checkout/i18n/zh_Hans_CN.csv
#	app/code/Magento/Checkout/view/frontend/layout/checkout_index_index.xml

Author: Cari Spruiell

app/code/Magento/Catalog/etc/widget.xml

@@ -96,7 +96,7 @@
                 <block class="Magento\Catalog\Block\Adminhtml\Product\Widget\Chooser">
                     <data>
                         <item name="button" xsi:type="array">
-                            <item name="open" xsi:type="string">Select Product...</item>
+                            <item name="open" xsi:type="string" translate="true">Select Product...</item>
                         </item>
                     </data>
                 </block>
@@ -135,7 +135,7 @@
                 <block class="Magento\Catalog\Block\Adminhtml\Category\Widget\Chooser">
                     <data>
                         <item name="button" xsi:type="array">
-                            <item name="open" xsi:type="string">Select Category...</item>
+                            <item name="open" xsi:type="string" translate="true">Select Category...</item>
                         </item>
                     </data>
                 </block>

app/code/Magento/Checkout/view/frontend/layout/checkout_cart_index.xml

@@ -142,7 +142,7 @@
                                                 <item name="subtotal" xsi:type="array">
                                                     <item name="component"  xsi:type="string">Magento_Checkout/js/view/summary/subtotal</item>
                                                     <item name="config" xsi:type="array">
-                                                        <item name="title" xsi:type="string">Subtotal</item>
+                                                        <item name="title" xsi:type="string" translate="true">Subtotal</item>
                                                         <item name="template" xsi:type="string">Magento_Checkout/cart/totals/subtotal</item>
                                                     </item>
                                                 </item>

app/code/Magento/Checkout/view/frontend/layout/checkout_index_index.xml

@@ -127,7 +127,7 @@
                                                                 <item name="component" xsi:type="string">Magento_Checkout/js/view/form/element/email</item>
                                                                 <item name="displayArea" xsi:type="string">customer-email</item>
                                                                 <item name="tooltip" xsi:type="array">
-                                                                    <item name="description" xsi:type="string">We'll send your order confirmation here.</item>
+                                                                    <item name="description" xsi:type="string" translate="true">We'll send your order confirmation here.</item>
                                                                 </item>
                                                                 <item name="children" xsi:type="array">
                                                                     <item name="before-login-form" xsi:type="array">
@@ -231,7 +231,7 @@
                                                                     <item name="telephone" xsi:type="array">
                                                                         <item name="config" xsi:type="array">
                                                                             <item name="tooltip" xsi:type="array">
-                                                                                <item name="description" xsi:type="string">For delivery questions.</item>
+                                                                                <item name="description" xsi:type="string" translate="true">For delivery questions.</item>
                                                                             </item>
                                                                         </item>
                                                                     </item>
@@ -270,7 +270,7 @@
                                                                 <item name="component" xsi:type="string">Magento_Checkout/js/view/form/element/email</item>
                                                                 <item name="displayArea" xsi:type="string">customer-email</item>
                                                                 <item name="tooltip" xsi:type="array">
-                                                                    <item name="description" xsi:type="string">We'll send your order confirmation here.</item>
+                                                                    <item name="description" xsi:type="string" translate="true">We'll send your order confirmation here.</item>
                                                                 </item>
                                                                 <item name="children" xsi:type="array">
                                                                     <item name="before-login-form" xsi:type="array">
@@ -365,7 +365,7 @@
                                                                 <item name="component"  xsi:type="string">Magento_Checkout/js/view/summary/shipping</item>
                                                                 <item name="config" xsi:type="array">
                                                                     <item name="title" xsi:type="string" translate="true">Shipping</item>
-                                                                    <item name="notCalculatedMessage" xsi:type="string">Not yet calculated</item>
+                                                                    <item name="notCalculatedMessage" xsi:type="string" translate="true">Not yet calculated</item>
                                                                 </item>
                                                             </item>
                                                             <item name="grand-total" xsi:type="array">