Fixed library issues

[shinyichen]

This PR addresses the following three issues of library view:

• When user viewing a public library who is not a collaborator, the edit buttons says “You have none privileges", but allows user to click on “View editing options” and add/remove papers.
  • In this case, when user has no permission, this edit button is removed.
• When selecting records, the “delete” option appears but the user cannot actually delete any record.
  • Delete button is not shown if user has no edit permission
• "View library in results page" button is not shown unless user has edit permission
  • Show "View library in results page" button regardless of permission

[thostetler]

Looks good, there is a minor conflict -- can merge any time then