Add a space between the project label and the select.

This is visually nicer than not having a space.

Change-Id: I8c0ce0450c2bb7207d7bb04bb9699e5abe9f2fa2
Add jQuery based Chosen for project selection.

This should make project selection nicer, as it offers a search box
rather than just a plain selector. At the moment, this is just based
on the existing list of projects, so users still need to know what
they're looking for.

Change-Id: Ic26dcb17742f70fa3ea20f26a7dc98a20e31f761