Sorting User Index by Alias (A-Z) or Alias (Z-A) does not function

[SpeedyD]

Bug as reported:

(Main branch, last commit parent: f447da64)

URL of page: <siteurl>/users?name=&rank_id=0&sort=alias or <siteurl>/users?name=&rank_id=0&sort=alias-reverse
Description of bug: Attempting to use 'Sort by Alias (A-Z)' or 'Sort by Alias (Z-A)' on the public User Index instead shows results for 'Sort Alphabetically (A-Z)', which is the default sorting method.
How was the bug caused (exact steps to reproduce): Go to the User Index, pick either 'Sort by Alias (A-Z)' or 'Sort by Alias (Z-A)' and click Search.

Further details

It just doesn't do anything?? I wonder if this was broken when additional methods of authentication were added, or if it was broken all along...