I think the height on the EmptyState component is always too long

[danielgolden]

Description

I think every time I've seen the <EmptyState /> component used outside of the nr1-community docs, it's always extended past the vertical bounds of it's container. I think this is because the height: 100% property isn't taking into account the 16px of margin-top and margin-bottom.

Steps to Reproduce

Go drop <EmptyState /> in a nerdlet and you'll see you either have to scroll to see the bottom of it or it just extends past it's containers height.

Expected Behaviour

I expect that it would sit inside of it's container without the need for scrolling to view it nor would it extend past it's container's height.
NOTE: # ( Tell us what you expected to happen. )

Possible solution

Swap out the height: 100% rule for height: calc(100% - 32px). this removes the extra 32px of height that are coming from the margin top and bottom of .empty-state.
TIP: # ( Include as many relevant details about your environment as possible. )

Additional Context

• NR1 CLI version used: @datanerd/nr1/1.16.1 darwin-x64 node-v10.16.3
• Browser name and version: Firefox 72.0.2
• Operating System and version: MacOS Catalina 10.15.2 (19C57)