Bug 13041: Fix add of basket's manager when name contains a single quote

Bug 13041: Fix add of basket's manager when name contains a single quote

If you are trying to add a user as a manager of a basket in
acquisitions, a JavaScript error will be triggered if that user has a
single quote in their name (e.g. "O'Neil"). This patch corrects the
issue.

Also changed by this patch: Increased the size of the patron search
popup and made a correction to some invalid HTML.

To test you should have a patron whose name contains a single quote who
is also a user with permission to manage acquisitions.

- Apply the patch and go to Acquisitions.
- Locate an open basket and view the details for that basket.
- In the "Managed by" section, click the "Add user" button to trigger
  the patron search popup.
  - Search for the patron described above and click the "Add" button.
  - In the parent window, the patron you chose should have been added to
    the "Managed by" section.

Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>