(minor) use CSS3 transformation for toggle icon

This is a result of last nights playing with CSS3 transformation. I use CSS3 transformation for
rotating the toggle icon now. Comes with backwards compatibility for non CSS3 transformation
capable browsers.

- patch set 3: proper indentation

Change-Id: I94fc9ef6e91f99e6549a819d4549e674baa68087
Merge "(minor) use CSS3 transformation for toggle icon"