AC-252: Refactor core MFTF TinyMCE Section

- add missed selectors
- cleanup unused section

Author: xmav

app/code/Magento/Cms/Test/Mftf/Section/TinyMCESection/TinyMCESection.xml

@@ -36,5 +36,7 @@
         <element name="EditArea" type="text" selector=".mce-edit-area"/>
         <element name="EditAreaIframe" type="iframe" selector=".mce-edit-area iframe"/>
         <element name="IframeContent" type="block" selector=".mce-content-body"/>
+        <element name="imageSource" type="text" selector="//img[contains(@src,'{{var1}}')]" parameterized="true"/>
+        <element name="ImageAlt" type="text" selector="//img[contains(@alt,'{{var1}}')]" parameterized="true"/>
     </section>
 </sections>

app/code/Magento/Newsletter/Test/Mftf/ActionGroup/AdminMarketingCreateNewsletterTemplateActionGroup.xml

@@ -22,7 +22,7 @@
         <fillField stepKey="fillTemplateSubjectField" selector="{{BasicFieldNewsletterSection.templateSubject}}" userInput="{{subject}}"/>
         <fillField stepKey="fillSenderNameField" selector="{{BasicFieldNewsletterSection.senderName}}" userInput="{{senderName}}"/>
         <fillField stepKey="fillSenderEmailField" selector="{{BasicFieldNewsletterSection.senderEmail}}" userInput="{{senderEmail}}"/>
-        <fillField stepKey="fillTemplateContentField" selector="{{NewsletterWYSIWYGSection.TextArea}}" userInput="{{templateContent}}"/>
+        <fillField stepKey="fillTemplateContentField" selector="{{TinyMCESection.Content}}" userInput="{{templateContent}}"/>
         <!--Saving Created Template-->
         <click stepKey="clickSaveTemplateButton" selector="{{AdminNewsletterMainActionsSection.saveTemplateButton}}"/>
     </actionGroup>

app/code/Magento/Newsletter/Test/Mftf/ActionGroup/AssertAdminNewsletterTemplateFormActionGroup.xml

@@ -21,6 +21,6 @@
         <seeInField stepKey="seeTemplateSubjectField" userInput="{{subject}}" selector="{{BasicFieldNewsletterSection.templateSubject}}"/>
         <seeInField stepKey="seeTemplateSenderNameField" userInput="{{senderName}}" selector="{{BasicFieldNewsletterSection.senderName}}"/>
         <seeInField stepKey="seeTemplateSenderEmailField" userInput="{{senderEmail}}" selector="{{BasicFieldNewsletterSection.senderEmail}}"/>
-        <seeInField stepKey="seeTemplateContentField" userInput="{{templateContent}}"  selector="{{NewsletterWYSIWYGSection.TextArea}}"/>
+        <seeInField stepKey="seeTemplateContentField" userInput="{{templateContent}}"  selector="{{TinyMCESection.Content}}"/>
     </actionGroup>
 </actionGroups>