Fix plugins after Action component change.

Depends-On: I8ed6e4c90b9c6bdbcaeb01fc276df5819cb47e1a
Change-Id: I4ec47f958b40eb0a03ab50d4a5611e00b0c83f39
Reviewed-on: http://gerrit.dmdirc.com/2659
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Tidy up Channel/ServerSettings dependencies.

Pass in a SwingController instead of jumping through 3 million
hoops to try and find one. It's simpler that way.

Change-Id: Ie0f8fa459df2c280c17a7de4d0c49eaa29c1a219
Reviewed-on: http://gerrit.dmdirc.com/2660
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager