MC-5107: Dynamic Block 'Use Default Value' checkbox doesn't work when user switch to a different store view

- Updated wysiwyg template to allow disabling
- Updated page-builder style for disabling pagebuilder
- Updated stage section for disabling and enabling pagebuilder

Author: Hwashiang Yu

app/code/Magento/PageBuilder/Test/Mftf/Section/PageBuilderStageSection.xml

@@ -14,6 +14,8 @@
         <element name="exitFullScreen" type="button" selector=".pagebuilder-header .action-close"/>
         <element name="stageLoading" type="button" selector="div.pagebuilder-stage-loading"/>
         <element name="stageWrapper" type="button" selector="//div[@class='pagebuilder-stage-wrapper']"/>
+        <element name="enabled" type="button" selector="//div[not(contains(@class, '_disabled')) and contains(@data-bind,'visible: visible')]//div[@class='pagebuilder-stage-wrapper']"/>
+        <element name="disabled" type="button" selector="//div[contains(@class, '_disabled') and contains(@data-bind,'visible: visible')]//div[@class='pagebuilder-stage-wrapper']"/>
         <element name="stageWrapperFullScreen" type="button" selector="div.pagebuilder-stage-wrapper.stage-full-screen"/>
         <element name="stageWidthJS" type="button" selector="document.querySelector('div[class~=\'stage-container\']').clientWidth"/>
         <element name="modal" type="text" selector='aside.modal-popup._show'/>

app/code/Magento/PageBuilder/view/adminhtml/web/css/source/_page-builder.less

@@ -25,6 +25,11 @@
 .pagebuilder-stage-wrapper {
     position: relative;
 
+    ._disabled & {
+        opacity: .5;
+        pointer-events: none;
+    }
+
     &.stage-full-screen {
         background: @color-white;
         height: 100%;

app/code/Magento/PageBuilder/view/adminhtml/web/template/form/element/wysiwyg.html

@@ -5,7 +5,7 @@
  */
 -->
 
-<div visible="visible">
+<div visible="visible" css="{'_disabled': disabled}">
     <button if="wysiwygConfigData()['pagebuilder_button']"
             type="button"
             class="action-default action"