Ignoring only mode changes on a per-network basis

Colin Ryan <[email protected]> Wed, 11 Feb 2015 20:02:45 -0800
Newsgroups gmane.network.irc.irssi.user
Message-ID <CAFaa6+UekF10-Wu-hN6wYMBW+Cui4CVMcqSU+PNH0ko5Q6abKw@mail.gmail.com>
I use Irssi to connect to a Slack IRC gateway.  Unfortunately it is
very verbose, and so I see a lot of this, constantly:

19:08:14 -!- mode/#chan [-v person1 : away] by person1
19:28:33 -!- mode/#chan [+v person1 : active] by person1

It seems that I can only /ignore JOINS PARTS QUITS NICKS and not MODES.

Am I missing something?  Is there a way to ignore modes only, per network?

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Colin Ryan