Merge branch 'MC-965-hide-content-on-stage' of github.com:magento-obsessive-owls/magento2-page-builder into MC-965-hide-content-on-stage

Author: anthoula

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

@@ -166,6 +166,7 @@
         height: 100%;
         justify-content: center;
         left: 0;
+        line-height: 0;
         opacity: 0;
         position: absolute;
         text-shadow: 0 0 25px rgba(238, 238, 238, .7);

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

@@ -26,9 +26,12 @@
             content: '';
             height: 1px;
             left: -1px;
+            opacity: 1;
             position: absolute;
             top: -2px;
+            visibility: visible;
             width: calc(~'100% + 2px');
+            z-index: auto;
         }
 
         &.empty-container {

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;