Update submodules: plugins (new commits)

plugins:
    60e66ce Greg Holmes <greg@dmdirc.com>
            Default to no selection as per other models.

            Gerrit: http://gerrit.dmdirc.com/3570

Change-Id: Ia2d1df145ba146f52ebffb6a112b0abd3d7575c3

modules/plugins

@@ -1 +1 @@
-Subproject commit ba73cd4af100063bbcc14acd2eceb86f553bf9be
+Subproject commit 60e66ce6af7ab1ccdf1b96db1c57e788e5440736