Resolve Mass Delete Widget should have "Confirmation Modal"

Author: edenduong

app/code/Magento/Widget/i18n/en_US.csv

@@ -71,3 +71,4 @@ Product,Product
 Conditions,Conditions
 "Widget ID","Widget ID"
 "Inserting a widget does not create a widget instance.","Inserting a widget does not create a widget instance."
+"Are you sure you want to delete the selected widget(s)?","Are you sure you want to delete the selected widget(s)?"

app/code/Magento/Widget/view/adminhtml/layout/adminhtml_widget_instance_block.xml

@@ -25,6 +25,7 @@
                                 <item name="label" xsi:type="string" translate="true">Delete</item>
                                 <item name="url" xsi:type="string">*/*/massDelete</item>
                                 <item name="selected" xsi:type="string">0</item>
+                                <item name="confirm" xsi:type="string" translate="true">Are you sure you want to delete the selected widget(s)?</item>
                             </item>
                         </argument>
                     </arguments>