Update submodules: plugins (new commits)

plugins:
    badf6da Greg Holmes <greg@dmdirc.com>
            Tidy up ActionEditorDialog and PropertyListCellRenderer.

            Remove unused renderer, add super class, tidy javadoc.

            Fixes-Issue: CLIENT-442
            Gerrit: http://gerrit.dmdirc.com/3160

Change-Id: I02fc9234b0c35bc635f4463e1851c4d707d0dca8