ConsoleAppender doesn't have 'append' property, causes ERROR msg on startup

`append` makes no sense for `ConsoleAppender`, causes non-critical:

    |-ERROR in ch.qos.logback.classic.gaffer.AppenderDelegate@f58853c - Appender [CONSOLE] of type [ch.qos.logback.core.ConsoleAppender] has no appplicable [append] property

BTW do you really want this?

    statusListener(OnConsoleStatusListener)

Produces a lot of DEBUG noise during startup.