Git: Remove args from diff

They are unused

Change-Id: I6cff3c6028208f1c7c0937c53b3f5090dae719a6
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Git: Refresh configuration widget if editor is found

Task-number: QTCREATORBUG-9783
Change-Id: Id1092fb9a79dfbf0425be4913241a507afb56a85
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>