Selection icon png update

[marmilicious]

This is an attempt to improve usability a bit. Currently the visual location of the selection pointer is offset from where the actual pick location is (which seems to be the upper left of the graphic). This moves the visual of the blue pointer point closer to that location. Or maybe there's a better way to do this?

Old and new png file.

[marmilicious]

That seems to feel better, thank you