Update plugins for core FrameContainer changes.

Change-Id: I15ab9677fdbcb510ab87a69a07ce8ecb3a994f7f
Depends-On: Ifa80de021c22d2e302d4b66514923cd08c91cac4
Reviewed-on: http://gerrit.dmdirc.com/3421
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>