MC-3398: Create/update MFTF tests for vertical alignment in tab item

- stabilize test

Author: anthoula

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

@@ -415,7 +415,7 @@
         </actionGroup>
         <!--Configure Third Row - Vertical Align Bottom -->
         <comment userInput="Configure vertical align bottom" stepKey="commentConfigureVerticalAlignBottom"/>
-        <!--<scrollTo selector="{{CmsNewPagePageActionsSection.pageTitle}}" stepKey="scrollToTop"/>-->
+        <scrollTo selector="{{CmsNewPagePageActionsSection.contentSectionName}}" stepKey="scrollToTopOfStage"/>
         <actionGroup ref="dragContentTypeToContainer" stepKey="dragTabsIntoRow3">
             <argument name="contentType" value="PageBuilderTabsContentType"/>
             <argument name="containerTargetType" value="PageBuilderRowContentType"/>