MC-3392: Hide Content block/ container from the stage

- Resolve further tab issues

Author: davemacaulay

app/code/Magento/PageBuilder/view/adminhtml/web/css/source/content-type/tabs/_default.less

@@ -129,11 +129,6 @@
                 }
             }
 
-            // Keeps the options showing while the user clicks. Otherwise the focus is lost and the options hide.
-            .pagebuilder-options:hover {
-                .pagebuilder-options-visible;
-            }
-
             &.focused {
                 a.tab-title .tab-drag-handle {
                     opacity: 1;

app/code/Magento/PageBuilder/view/adminhtml/web/js/content-type/tabs/preview.js

@@ -52,7 +52,7 @@ export default class Preview extends PreviewCollection {
                 create: () => {
                     // Ensure focus tab is restored after a rebuild cycle
                     if (focusedTab) {
-                        this.setFocusedTab(focusedTab);
+                        this.setFocusedTab(focusedTab, true);
                     }
                 },
             });
@@ -382,7 +382,6 @@ export default class Preview extends PreviewCollection {
                 duplicatedTab = args.duplicateContentType;
                 duplicatedTabIndex = args.index;
             }
-            this.buildTabs(args.index);
         });
         events.on("tab-item:mountAfter", (args: ContentTypeMountEventParamsInterface) => {
             if (duplicatedTab && args.id === duplicatedTab.id) {