improved autocomplete

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

frontend/src/Components/Autocomplete.svelte

@@ -15,7 +15,8 @@
     const ignore   = ['ArrowLeft','ArrowRight'];
     //let candidate  = $state({ display : '' });
     let selected   = $state([]);
-    let candidates = $derived(getCandidates(candidate.display));
+    let candidates = $state([]);
+    let timer      = null;
 
     async function dummyGetCandidates(text){
         console.warn(`getCandidates(${text}) not overridden!`);
@@ -56,6 +57,11 @@
         onSelect(candidate);
     }
 
+    async function fetchCandidates(){
+        candidates = await getCandidates(candidate.display);
+        if (selected>candidates.length) selected = candidates.length;
+    }
+
     async function onkeyup(ev){
         if (ignore.includes(ev.key)) return;
         if (ev.key == 'ArrowDown'){
@@ -94,8 +100,8 @@
         }
 
         candidate = { display : candidate.display };
-        candidates = await getCandidates(candidate.display);
+        if (timer) clearTimeout(timer);
-        if (selected>candidates.length) selected = candidates.length;
+        timer = setTimeout(fetchCandidates,400);
         return false;
     }
 </script>
@@ -109,7 +115,7 @@
 </style>
 
 <span>
-    <input type="text" bind:value={candidate.display} {onkeyup} autofocus={autofocus} {id} />
+    <input type="text" bind:value={candidate.display} {onkeyup} autofocus={autofocus} />
     {#if candidates && candidates.length > 0}
     <select bind:value={selected} {ondblclick} multiple tabindex="-1">
         {#each candidates as candidate,i}