Restore PREPRINTS_GOOGLE_ANALYTICS_ID to GOOGLE_ANALYTICS_ID.
Restore PREPRINTS_GOOGLE_ANALYTICS_ID to GOOGLE_ANALYTICS_ID.

CenterForOpenScience/ember-preprints,CenterForOpenScience/ember-preprints,laurenrevere/ember-preprints,baylee-d/ember-preprints,baylee-d/ember-preprints,laurenrevere/ember-preprints