Temp Fix: Navigating between routes was causing an error:

Error {stack: (...), message: "Cannot find module 'null'"}

Presumably caused by loading and unloading of  './icons.js'. More investigation is needed but this fixes the error for default icon usage. Testing is need for custom icons.
FIX: undefined variable.

event was not defined
Merge pull request #1 from kylefinley/hotfix/d-paper-item

Temp Fix: Navigating between routes was causing an error: