Added search box to ban list.

Having a search box for the ban list is useful to communities with a
large ban list.
Networked gimp/mute and gag

This is useful for showing if someone is gagged/gimped/muted on the
scoreboard (or other vgui).
Reverted the "Networked gimp/mute and gag" commit
Merge pull request #241 from iSnipeu/master

Added search box to ban list.