Inject update manager in a few places.

Again, add a deprecated method to SwingController/Manager to escape the dependency
hell temporarily.

Change-Id: Ia79f9199e8ca40dddddd8de6f9a44da042fc617f
Depends-On: Ia79f9199e8ca40dc3031234569a44da042fc617f
Reviewed-on: http://gerrit.dmdirc.com/3025
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>