fixed broken "add task" buttons in Kanban

frontend/src/Components/LineEditor.svelte

@@ -22,8 +22,12 @@
     async function applyEdit(){
         let success = await onSet(editValue);
         if (success) {
-            value = editValue;
-            editing=false;
+            if (success == 'reset'){
+                editValue = value;
+            } else {
+                value   = editValue;
+            }
+            editing = false;
         } else {
             editValue = value;
         }

frontend/src/routes/project/Kanban.svelte

@@ -78,8 +78,10 @@
             if (!tasks[user_id][state]) tasks[user_id][state] = {};
             tasks[user_id][state][task.id] = task;
             yikes();
+            return 'reset';
         } else {
             error(resp);
+            return false;
         }
     }
 
@@ -255,7 +257,7 @@
                     {/if}
                 {/each}
                 <div class="add_task">
-                    <LineEditor value={t('add_object',{object:t('task')})} editable={true} onSet={(name) => create(name,uid,state)}/>
+                    <LineEditor value={t('add_object',{object:t('task')})} editable={true} onSet={(name) => create(name,u.id,state)}/>
                 </div>
             </div>
         {/each}