Update submodules: plugins (new commits)

plugins:
    af5e767 Chris Smith <chris@dmdirc.com>
            Style fixes.

            Gerrit: http://gerrit.dmdirc.com/3310

Change-Id: I8f6636223a51c19622bf4ec37dc9d1082e6c8996
Update submodules: plugins (new commits)

plugins:
    da6f6d8 Greg Holmes <greg@dmdirc.com>
            Move initUISettings into plugin load

            Gerrit: http://gerrit.dmdirc.com/3309

Change-Id: Iee4fa29c96a69757bcc82c502d8b29c7996046b9
Update submodules: plugins (new commits)

plugins:
    840c7d8 Greg Holmes <greg@dmdirc.com>
            Move preferences stuff into another class (bodgy).

            Gerrit: http://gerrit.dmdirc.com/3311

Change-Id: I592a675fe74b0e17843e9314d39760fbb42431ad