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

Displays:

![screenshot 2014-05-24 16 17 17](https://cloud.githubusercontent.com/assets/531781/3074709/88d2b8ac-e34e-11e3-8b54-3b128deaa062.png)

... instead of:

![screenshot 2014-05-24 16 18 31](https://cloud.githubusercontent.com/assets/531781/3074707/6d5eeb0e-e34e-11e3-92f0-c5e56856e812.png)