fixed setName in ListTask

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

frontend/src/routes/task/ListTask.svelte

@@ -126,8 +126,8 @@
         }
     }
 
-    function setName(newName){
-        patchTask({name:newName});
+    async function setName(newName){
+        return await patchTask({name:newName});
     }
 
     function map_state(tx){