Previously you could either search for the hostname or the hostalias with distinct filters. This new filter returns both matches, e.g any hosts starting with 'server7' and any hostaliases with 'server7'.
The Quicksearch sidebar snapin also supports this new filter.
If you want to use it you need to edit the target view of the quicksearch,
usually searchhost, and replace the Hostname filter with the
Hostname or Alias filter. If both filters are active, you will only
get the hostnames on the quicksearch.
Reason: Hostname AND Hostname or Alias results in Just the hostname...