When programmatically changing the chart type, some default styles from original chart blend into subsequent charts

[rguttersohn]

Description

When updating the chart type, after an event is triggered, the default styles from the original chart blend into subsequent charts.
For example, let's say the original chart is an area chart. If changed to a bar chart, the bars have an opacity to them and the symbols in the legend do no update.

Steps to Reproduce

1. Go to js fiddle
2. Use select field to switch between chart types.
3. See that some of the default styles from the initial chart spill over into the next chart. If you switch the initial chart to bar and then change it to area, you'll see the same thing happens.

Expected Behavior

When changing the chart type programmatically, the default chart styles should be reset.

Actual Behavior

When changing the chart type programmatically, the styles of the original chart blend into the subsequent charts

Screenshots

See below where the bar chart has adopted styles from the area chart -- the initial chart.

Reproduction Link

Go to js fiddle