bug: multiselect在table自动生成维护表单时体验异常

### 这个问题是否已经存在?

- [x] 我已经搜索过现在的问题

### 如何操作复现这个问题

弹出表单编辑时选择下拉框的项，但是回显与预期不同

```
@page "/"
@using BootstrapBlazorApp.Shared.Components
@attribute [TabItemOption(Text = "Index", Closable = false)]
<PageTitle>Index</PageTitle>

<Table Items="items"
    AutoGenerateColumns
    ShowDefaultButtons
    OnColumnCreating="OnColumnCreating"
    ShowToolbar
    OnSaveAsync="OnSave"
    OnAddAsync="OnAdd"></Table>
     
    @code{
    private class Foo
    {
        /// <summary>
        /// 设置了自定义组件
        /// </summary>
        [AutoGenerateColumn(ComponentType = typeof(MultiSelect<string>))]
        public string Name { get; set; }
    }

private List<Foo> items = new List<Foo>();
    private List<SelectedItem> selectedItems = new List<SelectedItem>();

protected override void OnInitialized()
    {
        selectedItems = new List<SelectedItem>()
            {
                new SelectedItem("1","1"),
                new SelectedItem("2","2"),
                new SelectedItem("3","3"),
            };
        base.OnInitialized();
    }

private Task OnColumnCreating(List<ITableColumn> columns)
    {
        var column = columns.Where(o => o.GetFieldName() == "Name").First();
        column.ComponentParameters = new List<KeyValuePair<string, object>>()
            {
                new KeyValuePair<string, object>("Items",selectedItems)
            };
        return Task.CompletedTask;
    }

private Task<bool> OnSave(Foo item, ItemChangedType itemChangedType)
    {
        if (itemChangedType == ItemChangedType.Add)
        {
            items.Add(item);
            StateHasChanged();
        }

return Task.FromResult(true);
    }

private Task<Foo> OnAdd()
    {
        var item = new Foo();
        items.Insert(0, new Foo());
        return Task.FromResult(item);
    }
    }

```

### 预期结果

如果设置isexcel模式，表现是正常的

### 实际结果

在弹出表单模式下不正常

### 截图或者视频

![输入图片说明](https://foruda.gitee.com/images/1705306034755320297/b4d20018_7921723.png "屏幕截图")
![输入图片说明](https://foruda.gitee.com/images/1705306156317923733/39c4ea79_7921723.png "屏幕截图")
![输入图片说明](https://foruda.gitee.com/images/1705306240142498665/fe942aa4_7921723.png "屏幕截图")

### 复现工程或者仓库地址

https://gitee.com/tiansfather/bbdemo.git

### .NET Version

7

### Bootstrap Blazor Version

8.1.6

GVP LongbowEnterprise/BootstrapBlazor

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GVPLongbowEnterprise/BootstrapBlazor

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