AC-8379: Functional test stability fixes

Author: nishant04412

app/code/Magento/ConfigurableProduct/Test/Mftf/Test/AdminConfigurableProductDeleteTest/AdminConfigurableProductDeleteTest.xml

@@ -70,6 +70,7 @@
             <deleteData createDataKey="createConfigChildProduct1" stepKey="deleteConfigChildProduct1"/>
             <deleteData createDataKey="createConfigChildProduct2" stepKey="deleteConfigChildProduct2"/>
             <deleteData createDataKey="createConfigProductAttribute" stepKey="deleteConfigProductAttribute"/>
+            <deleteData createDataKey="createCategory" stepKey="deleteCategory"/>
 
             <!-- Reindex invalidated indices after product attribute has been created/deleted -->
             <actionGroup ref="CliIndexerReindexActionGroup" stepKey="reindexInvalidatedIndices">

app/design/adminhtml/Magento/backend/web/css/styles-old.less

@@ -1831,6 +1831,16 @@
         margin-left: 3px;
     }
 
+    //
+    //  Js-tree styles
+    //  --------------------------------------
+
+    .jstree-disabled {
+        .jstree-checkbox {
+            display: none;
+        }
+    }
+
     //
     //  Styles for "js" tooltip with positionings
     //  --------------------------------------