AO3-6113 hide autocomplete dropdown and cancel search immediately if there's nothing to search for instead

Author: slavalamp

public/javascripts/jquery.tokeninput.js

@@ -357,6 +357,12 @@ $.TokenList = function (input, url_or_data, settings) {
                     }
                     break;
             }
+        })
+        .keyup(function () {
+            if ($(this).val().length < settings.minChars) {
+                hide_dropdown();
+                clearTimeout(timeout);
+            }
         });
 
     // If the parent form is submitted and there is data in the input box, submit it
@@ -865,11 +871,6 @@ $.TokenList = function (input, url_or_data, settings) {
                 clearTimeout(timeout);
 
                 timeout = setTimeout(function(){
-                    query = input_box.val().toLowerCase();
-                    if (query.length < settings.minChars) {
-                        hide_dropdown();
-                        return;
-                    }
                     run_search(query);
                 }, settings.searchDelay);
             } else {