[tableVis] allow displaying partial rows

fixes #1911

**Show partial rows:**
![image](https://cloud.githubusercontent.com/assets/1329312/5038456/dd6aaba4-6b4d-11e4-9762-b3ce9435aa2e.png)

**Don't Show:**
![image](https://cloud.githubusercontent.com/assets/1329312/5038464/ed86e854-6b4d-11e4-9bbe-53895ff3a872.png)