make the selected items actually selected

front/src/components/DraggablePostsList.tsx

@@ -18,7 +18,7 @@ function PostDraggableListItem({ item, dragHandleProps, rows, setRows }: { item:
         <div className={style.draggableListRow}>
             <span>
                 <label for={`row-list-${item.id}`} style={{ display: 'none' }}>Select</label>
-                <input type='checkbox' id={`row-list-${item.id}`} onChange={onChange}/>
+                <input type='checkbox' id={`row-list-${item.id}`} checked onChange={onChange}/>
                 <GripVertical {...dragHandleProps} />
             </span>
             <Post className={style.posts} row={item} />