HarmonyOS 半模态圆角弹窗无法修改，自定义标题无法撑满全屏

可以参考以下demo

@Entry
@Component
struct bindsheet {
  @State isShow: boolean = false
  @State sheetHeight: number = 300;
  @State showDragBar: boolean = true;

  @Builder
  myBuilder() {
    Column() {
      Button('关闭关闭按钮')
        .margin(10)
        .fontSize(20)
        .onClick(() => {
          this.showDragBar = false;
        })
      Button('打开关闭按钮')
        .margin(10)
        .fontSize(20)
        .onClick(() => {
          this.showDragBar = true;
        })
    }
    .width('100%')
    .height('100%')
  }

  build() {
    Column() {
      Button('打开弹窗')
        .onClick(() => {
          this.isShow = true
        })
        .fontSize(20)
        .margin(10)
        .bindSheet($$this.isShow, this.myBuilder(), {
          detents: [SheetSize.MEDIUM, SheetSize.LARGE, 200],
          backgroundColor: Color.Gray,
          blurStyle: BlurStyle.Thick,
          showClose: this.showDragBar,
          // showClose属性为true时显示关闭按钮，不想通过关闭按钮来关闭bindsheet弹窗的话，可以将showClose属性变为false
          enableOutsideInteractive: false,
          preferType: SheetType.CENTER,
          shouldDismiss: ((sheetDismiss: SheetDismiss) => {
            console.log('bind sheet shouldDismiss')
            sheetDismiss.dismiss()
          })
        })
    }
    .justifyContent(FlexAlign.Start)
    .backgroundColor('#ff578ddd')
    .width('100%')
    .height('100%')
  }
}
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