Legend problem with too many samples

[WilliamKMLai]

The legend just keeps going down vertically. It should begin making another column to the right when it senses it's below the length of the figure

[jcha40]

At the moment there is not enough room to add a second column, at least with the default legend labels. Maybe we should scale it down instead? Or possibly combine the two ideas and add a column when it's scaled enough that there is enough room.