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

[tommyjasmin]

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

[tommyjasmin]

One more thing guys - after accept, you will want to throw the standard Unidata copyright at the top of FrontDrawingControl.java

[julienchastang]

Thanks @tommyjasmin. Merged.