Allow For Entries to be Undefined

The Problem

e.entries console error in event detail - sometimes there is no field for entries

The Solution

• Add test to ensure there is no longer a console type error for undefined entries
  • The test itself seems kind of basic - but the key with it is that there is no longer a console error, and entries is allowed to be undefined
• For entries selectors (there are four), add check to see if entries is undefined
• Update interfaces
• Update storybook and add story with noEntries test data to Event Detail story

Closes #33 (closed)