also merges day-long events showing at the top of the week mode display

Displays:

![image](https://cloud.githubusercontent.com/assets/531781/3074696/315d23d2-e34e-11e3-9b54-a83c1f37662d.png)

... instead of:

![image](https://cloud.githubusercontent.com/assets/531781/3074704/537e7f1a-e34e-11e3-8800-a3b9ca3f723b.png)