Consider if this can somehow be the "out of the box" situation for Composr. That adds a dependency of #860 to this.

A lot of people install Composr and skip the Setup Wizard - or get it via some method other than our own installer, and ignore the advice to run the Setup Wizard because they want to play right away.
Such users then complain it's too complex, so we need to save them from themselves to some extent.

We can still bundle it all, just bundling doesn't mean auto-installed until Setup Wizard is run.