This enables us to make use of self.ui in all repositories without
having to import and use getglobalui() in all types of repositories and
all places.
Note that this patch only makes this available, it does not yet make use
of it.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>