Update submodules: plugins (new commits)

plugins:
    fe5c818 Chris Smith <chris@dmdirc.com>
            Replace TextPaneBoundedRangeModel with the default.

            Seems functionally identical aside from a couple of bugs in the
            TextPane one :-)

            Gerrit: http://gerrit.dmdirc.com/4084

Change-Id: Icc4518e4250b23d0664ad3440e166a3f6565ba24