[#32342] Fix wrong pluralization

* JCode [32342](http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=32342&start=0)

The pluralization of the visitors counter in the backend mod status is wrong.

##### Before
![@BUG mod_status before](https://f.cloud.github.com/assets/33978/1353270/ca86b2fc-3742-11e3-9a1d-39379776751c.png)

Note the plural form for `1 Visitors` and `1 Admins`.

##### After
![mod_status7](https://f.cloud.github.com/assets/33978/1357894/6d560838-37a8-11e3-8021-042c2d9b5b22.png)

----
The original proposal was:
![mod_status fixed](https://f.cloud.github.com/assets/33978/1353267/c5f00766-3742-11e3-9b76-79bd7759b9d0.png)
the text had been moved to a tooltip.