Fix for Bug 3523 - Menu of existing lists limited to 10

Fix for Bug 3523 - Menu of existing lists limited to 10

- adding "more" option to the search results dropdown
- offering a scrolling list on the add-to-list popup
- lists add popup shows the full list of all
  the patron's lists, divided into groups of private and
  public lists.

Can be improved by a fix for Bug 5529

Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>