MAGETWO-91923 static test failures

- Fixed panel.less

Author: Michael Yu

app/code/Magento/PageBuilder/view/adminhtml/web/css/source/_panel.less

@@ -266,12 +266,13 @@
 
             &.active {
                 .group-title {
-                    :before {
-                        content: @icon-caret-up__content;
-                    }
                     h4 {
                         color: @color-ivory;
                     }
+
+                    :before {
+                        content: @icon-caret-up__content;
+                    }
                 }
                 .pagebuilder-panel-groups-child {
                     background: @color-brownie-almost;