fix: don't submit form on autocomplete (#3554)

Author: Paul-Bob

app/javascript/js/controllers/form_controller.js

@@ -2,7 +2,10 @@ import { Controller } from '@hotwired/stimulus'
 
 // Connects to data-controller="form"
 export default class extends Controller {
-  submit() {
+  submit(event) {
+    // return if event.key is undefined preventing the form submit on autocomplete event
+    if (!event.key) return
+
     this.element.requestSubmit()
   }
 }