Fix datatip showing behind axis label

I have a datatip issue. I would like it to show before the ylabel, but I couldn't change it using uistack…

There is a minimal example here:

http://stackoverflow.com/questions/17584094/datatip-stack-on-top-of-axis-label

How is it possible (if it is) to make the axes label text to get bottom from the datatips?

Thank you!