Comment 0 for bug 1766506

[Machine]
Dell Vostro 3900
  [Version]
18.04 daily 20180421
kylin-video_1.1.6-0ubuntu1
  [Details]
[Peony]The pictures show in three columns when openning the Setting by Change Desktop Background.
【文件浏览器】通过右键菜单打开更改桌面背景，背景排列显示异常
  [Test Case]
1. Right-click the desktop and choose Change Desktop Background
2. Open Start menu-Settings-Personalization-wallpaper
Expected Result: The pictures show in 4 columns
Actual Result:
1.The pictures show in three columns
2.The pictures show in 4 columns