Feature summary (what you would like to be able to do and where):
In WSContest contest page, there are multiple columns (User, Points, Contributions, Validations), but there's only one default sort, that is by Points. The sortable column would work just like in-wiki's "sortable" style. Reader could then sort the columns by Username, Contributions, Validations, ascending, and descending.
Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
For example, go to: https://wscontest.toolforge.org/c/60
There's no easy way to tell the rank of the validators, and contributors.
Benefits (why should this be implemented?):
It could be beneficial to the contestant as well as admins to be able to tell, for example: who are the top validator, list of users by username, etc.