fix modal title

app/javascript/template_builder/formula_modal.vue

@@ -9,7 +9,7 @@
     <div class="modal-box pt-4 pb-6 px-6 mt-20 max-h-none w-full max-w-xl">
       <div class="flex justify-between items-center border-b pb-2 mb-2 font-medium">
         <span class="modal-title">
-          {{ t('formula') }} - {{ field.name || buildDefaultName(field, template.fields) }}
+          {{ t('formula') }} - {{ (defaultField ? (defaultField.title || field.title || field.name) : field.name) || buildDefaultName(field, template.fields) }}
         </span>
         <a
           href="#"
@@ -137,6 +137,11 @@ export default {
       type: Object,
       required: true
     },
+    defaultField: {
+      type: Object,
+      required: false,
+      default: null
+    },
     editable: {
       type: Boolean,
       required: false,