Replace event from frontend to base

Author: UncleTioma

app/code/Magento/Customer/etc/events.xml

@@ -15,4 +15,7 @@
     <event name="sales_quote_save_after">
         <observer name="customer_visitor" instance="Magento\Customer\Observer\Visitor\BindQuoteCreateObserver" />
     </event>
+    <event name="customer_save_after_data_object">
+        <observer name="upgrade_quote_customer_email" instance="Magento\Customer\Observer\UpgradeQuoteCustomerEmailObserver"/>
+    </event>
 </config>

app/code/Magento/Customer/etc/frontend/events.xml

@@ -29,7 +29,4 @@
         <observer name="customer_password" instance="Magento\Customer\Observer\UpgradeCustomerPasswordObserver" />
         <observer name="customer_unlock" instance="Magento\Customer\Observer\CustomerLoginSuccessObserver" />
     </event>
-    <event name="customer_save_after_data_object">
-        <observer name="upgrade_quote_customer_email" instance="Magento\Customer\Observer\UpgradeQuoteCustomerEmailObserver"/>
-    </event>
 </config>