Update Toggle on ListView

[ehunter-usgs]

Create a separate toggle for the accordion, do not try to multi-purpose the earthquake count text.

fixes #48

I think this satisfies more of the feedback that I received:

• "People don't know that there is more information"
• "People don't know the text is clickable"
• "The content in the accordion doesn't look like it goes with the accordion toggle"

[ehunter-usgs]