MC-2258: Automate MFTF

Author: kieuphan2406

app/code/Magento/PageBuilder/Test/Mftf/Test/AdminPageBuilderBlockTest.xml

@@ -495,6 +495,7 @@
         <actionGroup ref="searchBlockInGrid" stepKey="searchBlockInGrid">
             <argument name="block" value="$$createPreReqBlock$$"/>
         </actionGroup>
+        <waitForLoadingMaskToDisappear stepKey="waitForLoadingMaskToDisappear"/>
         <actionGroup ref="expandConfigurationSection" stepKey="expandConfigurationSection"/>
         <!-- Update Values -->
         <comment userInput="Update Values" stepKey="commentUpdateValues"/>