fix supermarket categories

vue/src/components/Modals/LookupInput.vue

@@ -44,7 +44,7 @@ export default {
                 return undefined
             },
         },
-        class_list: {type: String, default: "mb-3"},
+        class_list: { type: String, default: "mb-3" },
         show_label: { type: Boolean, default: true },
         clear: { type: Number },
     },
@@ -71,6 +71,9 @@ export default {
             return this.form?.multiple || this.form?.ordered || false
         },
         initialSelection() {
+            if (!this.new_value) {
+                return
+            }
             let this_value = this.new_value
             let arrayValues = undefined
             // multiselect is expect to get an array of objects - make sure it gets one