Hide EventSummaryView using dislay: none; so that the users cannot scroll the overflow on the list

[ehunter-usgs]

fixes #261

This addresses a small bug where user's can continue to scroll the list once they have reached the bottom (on iOS devices).

To recreate you have to wait for the elastic rebound before you continue scrolling from the bottom.

[jmfee-usgs]

• Currently failing tests.
• Can you fix this using an overflow: hidden rule instead of a timeout?

[ehunter-usgs]

@jmfee-usgs how about this PR instead? PR -> https://github.com/usgs/earthquake-latest-earthquakes/pull/277

I'm still testing in IE, but it seems like a reasonable alternative.

[ehunter-usgs]

addressed by #277