Remove swing debug plugin

Change-Id: I939da5557d053862819139d800f4e312a4bc032b
Reviewed-on: http://gerrit.dmdirc.com/3260
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Build Manager
Use an event bus.

Change-Id: If3622b2ac5f517832dc886c6f42405641d6ff9a6
Reviewed-on: http://gerrit.dmdirc.com/3257
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager