Scatter Plot filter should default to Plot Matrix view

When you add a Scatter Plot filter, by default a Line Chart view is created to show the results. Although the Line Chart can eventually be modified to create a desired scatter plot, the plot that comes by default is a mess.

In contrast, the Plot Matrix view shows exactly the scatter plots that you would expect from a scatter plot filter. It additionally has much better controls to find the scatter plot for the variables desired. The Scatter Plot filter should be changed so that the Plot Matrix view comes up.

To be absolutely clear what I'm talking about, here are the steps to replicate.

1. Load disk_out_ref. All variables on. Apply.
2. Add the Scatter Plot filter. Apply.
3. You get a view that looks like this. Blech.

4. Now right-click on the bar above the line chart view and select Convert To... -> Plot Matrix View. Then click on the visibility icon for the Scatter Plot in the Pipeline Browser. The view gets converted to this, which is much, much, much better.

The plot matrix is what should come up first, not the line chart.