HarmonyOS Popup组件中的内容无法铺满屏幕宽度，左右均有8vp的空白

import { BusinessError } from '@ohos.base';  
import { ComponentContent } from "@ohos.arkui.node";  
class Params {  
  text: string = ""  
  constructor(text: string) {  
    this.text = text;  
  }  
}  
@Builder  
function buildText(params: Params) {  
  Column() {  
    Text(params.text)  
      .fontSize(50)  
      .fontWeight(FontWeight.Bold)  
      .margin({ bottom: 36 })  
      .fontColor('#A974A8')  
  }.backgroundColor('#2B2B2B')  
}  
@Entry  
@Component  
struct Index {  
  @State message: string = "hello";  
  @State list: Array<number> = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19];  
  @State numberArray: Array<boolean> = new Array(this.list.length).fill(false);  
  @State currentItem:number = 0;  
  build() {  
    Column() {  
      List() {  
        ForEach(this.list, (item: number, index: number) => {  
          ListItem() {  
            Row() {  
              Text('第' + item + '个')  
              Button("click me")  
                .onClick((event:ClickEvent)=>{  
                  let uiContext = this.getUIContext();  
                  let promptAction = uiContext.getPromptAction();  
                  let contentNode =  
                    new ComponentContent(uiContext, wrapBuilder(buildText), new Params(item.toString()));  
                  try {  
                    promptAction.openCustomDialog(contentNode, {  
                      maskColor: Color.Transparent,  
                    });  
                  } catch (error) {  
                    let message = (error as BusinessError).message;  
                    let code = (error as BusinessError).code;  
                    console.error(`OpenCustomDialog args error code is ${code}, message is ${message}`);  
                  }  
  
                    try {  
                      promptAction.updateCustomDialog(contentNode, {  
                        alignment: DialogAlignment.TopStart,  
                        maskColor: Color.Transparent,  
                        offset: { dx: event.displayX, dy: event.displayY}  
                      });  
                    } catch (error) {  
                      let message = (error as BusinessError).message;  
                      let code = (error as BusinessError).code;  
                      console.error(`updateCustomDialog args error code is ${code}, message is ${message}`);  
                    }  
  
                })  
            }  
            .width('100%')  
            .height(100)  
            .borderRadius(10)  
            .backgroundColor(0xFFFFFF)  
            .justifyContent(FlexAlign.SpaceBetween)  
          }  
        })  
      }  
      .width('90%')  
      .listDirection(Axis.Vertical) // 排列方向  
      .scrollBar(BarState.Off)  
      .friction(0.6)  
      .divider({  
        strokeWidth: 2,  
        color: 0xFFFFFF,  
        startMargin: 20,  
        endMargin: 20  
      }) // 每行之间的分界线  
      .edgeEffect(EdgeEffect.Spring) // 边缘效果设置为Spring  
    }  
    .width('100%')  
    .height('100%')  
    .backgroundColor(0xDCDCDC)  
    .padding({ top: 5 })  
  }  
}