visually aligned bubble with event text

the bubble/line is now more better aligned with event text

### before:
![before](https://f.cloud.github.com/assets/961423/1660233/c15d8932-5bb7-11e3-85df-b9e7e6261619.png)

### after:
![after](https://f.cloud.github.com/assets/961423/1660250/e2a2f3c0-5bb7-11e3-9162-daca5d90419f.png)