Remove some usages of Main.

Change-Id: Ie4d579ba97c2c1ed8a727f6548bdd9ae98981bdf
Depends-On: I5f88cccf81f0fb80e2fcf915d453660d5690c8c0
Reviewed-on: http://gerrit.dmdirc.com/2709
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Remove the Dummy UI.

This was originally intended for testing purposes, but we can do that
effectively with mocks. It's a pain to maintain and doesn't offer
any real benefit.

Change-Id: I8a7f1112986b6b6b9257382adc12ace66f55faa6
Reviewed-on: http://gerrit.dmdirc.com/2711
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager