preparing creation of new times

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

frontend/src/routes/task/ListTask.svelte

@@ -26,6 +26,10 @@
         router.navigate(`/task/${task.id}/add_subtask`);
     }
 
+    function addTime(){
+        router.navigate(`/time/add_task/${task.id}`);
+    }
+
     async function deleteTask(){
         if (confirm(t('confirm_delete',{element:task.name}))){
             const url  = api(`task/${task.id}`);
@@ -147,7 +151,7 @@
     {/if}
     <button class="symbol" title={t('delete_task')} onclick={deleteTask} ></button>
     <button class="symbol" title={t('add_subtask')} onclick={addSubtask}></button>
-    <a href="/time/add_task?tid={task.id}" class="symbol"></a>
+    <button class="symbol" title={t('timetracking')} onclick={addTime}></button>
     {#if error}
     <span class="error">{error}</span>
     {/if}