Area where the icons gets mouseover/mouseclick/... is too small

[haytjes]

The area where you can click on an icon is smaller than the bar_height+icon_offset. So it stops earlier than the the top of the icon.

devs:
I searched already after this one, but didn't found it. The bug is probably that for getting the height of the area that needs to be active, it picks the height/2, but the height equals bar_height*2+icon_offset, actually it should be: "(height-icon_offset)/2+icon_offset" or "bar_height+icon_offset" or "height/2+icon_offset/2". The problem is that I don't find the place in the source where I need to adjust it.