Fix #6898: avoid black rectangle after completion

Author: avernet

form-runner/jvm/src/main/assets/apps/fr/style/form-runner-base.less

@@ -172,6 +172,11 @@
         .clearfix()
     }
 
+    input-style-clone {
+        // Fix black rectangle under text field using text-expander-element after completion
+        border: none !important;
+    }
+
     // ***** XForms Controls *******************************************************************************************
 
     // Hide alerts by default