MAGETWO-91135: Stabilize Pagebuilder Hackthon1 Delivery Branch

- Adding waitForPageLoad to removal confirmation modal

Author: dhaecker

dev/tests/acceptance/tests/functional/Magento/FunctionalTest/PageBuilder/ActionGroup/ActionGroup.xml

@@ -195,6 +195,7 @@
         <wait time="1" stepKey="waitForModalEventBinding" />
         <click selector="{{PageBuilderActionsSection.modalOk}}" stepKey="confirmRemoveModal"/>
         <waitForElementNotVisible time="1" selector="{{PageBuilderActionsSection.modalOk}}" stepKey="waitForModalHide" />
+        <waitForPageLoad stepKey="waitForPageLoad"/>
     </actionGroup>
 
     <!-- Remove a content block which has been configured with data or has children -->