New Query Options tray added

For scope, see: https://issues.apache.org/jira/browse/COUCHDB-2347

Two important things to mention:
1. The "Compact View" button has been removed. I want to discuss with @seanbarclay about whether it should really appear in the tray.
2. There's an outstanding issue (outside this ticket) where the header bar doesn't always show the correct content when navigating from page to page.
True, however in this case I needed to store it. It was due to an interesting race condition: the hide/showQueryOptions function could be called prior to the `RightAllDocsHeader` View being actually rendered (since it loads its template async). Because of that, the `afterRender` function knows whether to hide it or not. Not terribly elegant, but an ok workaround I figured...