[taskbar]After changing taskbar height and icon size to medium or large, the icons turn gray.

[kyt]

[Machine]
Dell Vostro 3900
  [Version]
18.04 daily 20180412 +
kylin-video_1.1.6-0ubuntu2、
youker-assistant_3.0.4、
Ukui-control-center_1.1.2-0ubuntu1

  [Details]
[taskbar]After changing taskbar height and icon size to medium or large, the icons turn gray.
【任务栏高度和图标大小】设置成中或者大，任务栏图标变成灰色系

  [Test Case]
1. Right-click panel and open Settings
2. Change taskbar height and icon size to medium or large in Panel Settings and check the icons
Expected Result:the icons remain white.
Actual Result:the icons turn gray.

[Xu Jianhong (jianhong)]

This bug was not fixed in bionic-final 0425 version

[kyt (952456204-6)]

This bug exists in bionic-final 20180427 enhanced.