problem with default taskbar button: Move Down

[chakra85]

the default taskbar button for Move Down has an unnecessary and somewhat misleading shadow underneath it. the line-like shadow under the Move Down button almost always signifies move to the end rather than move one position (look at the audio controls in your car). to fix it, all a developer would need to do is remove the shadow from the control. to make it consistent you could also remove the shadow from all of the media-player-like controls: play, pause, stop, up and down.