Change-Id: I3686ac83e5fdc009b03e84ab3c7b24a052d119c4
Reviewed-on: http://codereview.qt.nokia.com/569


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

Merge-request: 229
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

Details: Use a global model for nicknames that is shared by all dialogs to solve the updating  problems. Make p4 plugin submit work again. Force a submit prompt in case of shutdown or editor close (as opposed to user clickling on "Submit").

With many git commands it is safer to disambiguate files from refs by
putting '--' in front of the list of files.

Also corrected a margin in the git submit panel.