When exists notification bar, added icon to open notification bar on top bar.
Litte improvements
Merge pull request #1006 from diegoeis/3.1.0

Convertendo rem para px
Remove unnecessary span on boilerplate
If span exist on top bar not added
Merge pull request #1007 from Wylkon/3.0.2

When exists notification bar, added icon to open notification bar
moving track events doc to right place.