Fixed outline vs border styl for selected elements.

Seems like some of the code of this issue #56 is missing.

In particular, I've returned outlines instead of border to avoid elements position shift when you select them. Checked it with texts, images and shapes - everything works like a charm.

P.S. I haven't found any mentions of the reason why it was reverted, so if it was by some purpose, please sorry for wasting your time.