Polling interval field CSS update
Fixed unit test
Squashing.

Closes COUCHDB-2371
Adding right header back to databases page.

This was broken in the recent right refactor of the right header.

Closes COUCHDB-2381
Remove api bar from RightAllDBsHeader

This expands upon Christian's work and removes the api bar component
from the RightAllDBsHeader. It mimics Christians work for the documents
module.