V2.0 Style Fixes

[DavidBlavid]

Some minor style fixes for the 2.0 website. Changes:

• The Copy Citation button has been moved below the systems link
• Added a clipboard emoji to the Copy Citation button
• The search bar is 400px wide now, same as the Copy Citation button
• The text of the system link is slightly changed

[DavidBlavid]

The first image shows how it currently looks, the second is our target.