Free drawing and Front drawing have separate tables and column labels [1536]

Hi guys - 

This fixes a problem where Free Drawing control and Front Drawing controls where sharing the same JTable class (an extension of AbstractTableModel).  As a result the tables were mis-labeled.  We just gave the Front control its own class, which returns the proper column label.  Me, Jon, and Mike looked at this together all all agreed it's a decent, clean solution.

Both pics below show corrected behavior, you can compare with current behavior.

Free drawing: Displays -> Special -> Drawing Control

Front drawing: Data Choosers -> Fronts -> Add Source

![screen shot 2014-03-06 at 3 35 02 pm](https://f.cloud.github.com/assets/2334847/2351058/19628538-a578-11e3-8bc5-e63117869295.png)

![screen shot 2014-03-06 at 3 34 24 pm](https://f.cloud.github.com/assets/2334847/2351059/20557d5a-a578-11e3-9bc6-b2b60119343a.png)