ENGCOM-6290: Resolve No margin between checkbox and icon when choose category in condition in Cart/Catalog Rule issue25596 #25597

 - Merge Pull Request #25597 from edenduong/magento2:2.3-bugfix/margin_icon_checkbox_issue25596
 - Merged commits:
   1. 9f5fece

Author: magento-engcom-team

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

@@ -1827,6 +1827,10 @@
         background-image: url(../images/fam_application_form_delete.png);
     }
 
+    .x-tree-node .x-tree-node-el input[type=checkbox] {
+        margin-left: 3px;
+    }
+
     //
     //  Styles for "js" tooltip with positionings
     //  --------------------------------------
@@ -3958,15 +3962,15 @@
         .grid tr.headings th > span {
             white-space: normal;
         }
-        
+
         .field {
             &.field-subscription {
                .admin__field-label {
                     margin-left: 10px;
                     float: none;
                     cursor: pointer;
-               } 
-                
+               }
+
                .admin__field-control {
                     float: left;
                     width: auto;