Style Select control in "all books" search view.

[NeilNjae]

Everything else on the library/books/ page follows the material design guidelines, but the Select widget doesn't. Would be nice if the widget looked as good as the rest of the page.

[NeilNjae]

Partially solved by pull request #33 . The styling is present in most pages, but not in the "All books" page, where the search box has the additional control to select how results are ordered.