Merge pull request #2772 from BatJan/features/temp-U4-11495

U4-11495 - Add border to custom regex in property settings

src/Umbraco.Web.UI.Client/src/less/components/umb-group-builder.less

@@ -530,6 +530,13 @@ input.umb-group-builder__group-title-input {
         overflow: hidden;
     }
 
+    .editor-validation-pattern{
+        border: 1px solid @gray-7;
+        margin: 10px 0 0;
+        padding: 6px;
+        max-height: 32px;
+    }
+
     .umb-dropdown {
         width: 100%;
     }