As an admin, I want to be able to browse and sort posters

[sheilabrennan]

Needs:

• [ ] admin browse action and view

Works when:

• [ ] admin browse page, with pagination displays all posters
• [ ] sorting criteria TBD in comments work @sheilabrennan could you say more about the sorting you want?

The pattern for building sorting here might be helpful https://github.com/omeka/Omeka/blob/master/admin/themes/default/items/browse.php#L39

[sheilabrennan]

Sort by User, Title of Poster, Date Created