Fix selection in the Analytics dropdown menu

Steps to reproduce:

1. Create 4 workspaces under the root of Workspaces
2. In the Web UI, navigate to Administration > Analytics
3. In Document distribution, navigate to the Workspaces document
4. Click on the dropdown menu
5. The list of children (4) is displayed
6. Try to the select the fourth element of the list with the mouse
7. Observe you can't !
8. It's possible to select it by using the arrows of the keyboard

Expected result: I should be able to select any item in the dropdown menu with the mouse

Note: the bug seems fixed in 10.10 but I did not find the ticket which fixed it.