Fixed MFTF automation flaky tests

Author: glo71317

app/code/Magento/Catalog/Test/Mftf/Test/StorefrontCategorySidebarMobileMenuTest.xml

@@ -42,6 +42,7 @@
         <click selector="{{StorefrontHeaderSection.mobileMenuToggle}}" stepKey="openSideMenu"/>
         <waitForElementClickable selector="{{StorefrontHeaderSection.NavigationCategoryByName($$createParentCategory.name$$)}}" stepKey="waitForCategoryMenuClickable" />
         <click selector="{{StorefrontHeaderSection.NavigationCategoryByName($$createParentCategory.name$$)}}" stepKey="expandCategoryMenu"/>
+        <waitForPageLoad stepKey="waitForSearchResult"/>
 
         <!-- Assert the category expanded successfully -->
         <actionGroup ref="StorefrontAssertCategoryNameIsShownInMenuActionGroup" stepKey="verifySubCatMenuItemIsVisibleInTheSidebar">

app/code/Magento/CheckoutAgreements/Test/Mftf/ActionGroup/StorefrontProcessCheckoutToPaymentActionGroup.xml

@@ -16,6 +16,7 @@
         <click selector="{{StorefrontMinicartSection.goToCheckout}}" stepKey="goToCheckout"/>
 
         <!--Process steps-->
+        <waitForPageLoad stepKey="waitForSearchResult"/>
         <fillField selector="{{CheckoutShippingSection.emailAddress}}" userInput="{{CustomerEntityOne.email}}" stepKey="enterEmail"/>
         <fillField selector="{{CheckoutShippingSection.firstName}}" userInput="{{CustomerEntityOne.firstname}}" stepKey="enterFirstName"/>
         <fillField selector="{{CheckoutShippingSection.lastName}}" userInput="{{CustomerEntityOne.lastname}}" stepKey="enterLastName"/>

app/code/Magento/MediaGalleryUi/Test/Mftf/Test/UserDeletesFolderFromMediaGalleryTest.xml

@@ -59,6 +59,7 @@
         <actionGroup ref="AdminMediaGalleryFolderSelectActionGroup" stepKey="unselectFoldersToVerifyDeleteFolderButtonStatus">
             <argument name="name" value="{{AdminMediaGalleryFolderData.name}}"/>
         </actionGroup>
+        <waitForPageLoad stepKey="waitForSearchResult"/>
         <seeElement selector="{{AdminMediaGalleryFolderSection.disabledDeleteFolderButton}}" stepKey="DeleteFolderButtonIsDisabled"/>
 
         <!-- Step4.2 Delete Folder is enabled post selecting folder -->