Provide button to place incoming volume to the center of the current view

[JThoennissen]

It would be useful and time saving if you could place the incoming volume to the center of the current view. For example if the incoming volume is very small you could then navigate to a specific position in the brain and let the volume be placed in the center of the current view by clicking the button. Otherwise you have to drag and drop the volume all across the slices to the correct position.