MC-4012: Remove redundant focus state on Text

- remove focus on text and heading

Author: anthoula

app/code/Magento/PageBuilder/view/adminhtml/web/css/source/_inline-wysiwyg.less

@@ -7,6 +7,14 @@
 //  Source -> Inline WYSIWYG
 //  _____________________________________________
 
+._keyfocus {
+    .inline-wysiwyg {
+        &:focus {
+            box-shadow: none;
+        }
+    }
+}
+
 .inline-wysiwyg {
     .magento-placeholder {
         height: auto;

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

@@ -7,10 +7,23 @@
 //  Default appearance styles
 //  _____________________________________________
 
+._keyfocus {
+    [data-content-type='heading'] {
+        &:focus {
+            box-shadow: none;
+        }
+    }
+}
+
 .pagebuilder-heading {
     &.pagebuilder-content-type {
         display: block;
+
+        &:focus {
+            box-shadow: none;
+        }
     }
+
     > div {
         margin: 0;
         padding: 0;