Description of problem:
On the project list page and file list page,
there are 6 navigation buttons on the page navigation bar.

From left to right:
 
  1.      2.    3.                     4.    5.     6.
<< <<    <<    prev  (Page numbers)   next   >>    >> >>

The first is clearly the "Go to first page", and the last is the "Last".

However, there is not obviously way to tell what button 2 and 5 actually means.

Version-Release number of selected component (if applicable):
Zanata version 1.8.0-SNAPSHOT (20120827-0014)


How reproducible:
Always

Steps to Reproduce:
1. Go to a project that have multiple pages of document (such as Skynet)
2. Mouse hovering on button 2 or button 5.
  
Actual results:
Nothing happen.

Expected results:
The actual meaning should show on either the button label, or the tool-tip.
Like "move to previous 5"

Additional info:
The behaviour of button 2 and 5 are just like "previous page" and "next page".