Trash can aligned correnctly

Closes COUCHDB-2279
Fauxton: Implement a filter for changes

Move the filter as a common component to Components.

- Change some <%= to <%- as <%= is not needed
- Filters can have tooltips
- Filtering is case insensitive

Closes COUCHDB-2158
Fix link for new design doc
Add tests for documents/views-changes

Closes COUCHDB-2282
Link local docs in Fauxton

Instead of linking to the latest version online, we link to the
docs for the locally installed version. The docs are
generated automatically when running make / make install, if you
have Sphinx installed. For development, the dev-server will just
proxy the request.