- Enable Git LFS support, since it's nice to have.
- Enable offline mode to avoid relying on CDNs (and to not use
Gravatar).
- Enable notification mails for repo activity.
- Put setting for default repo units into "repository" category as the
"repo" category doesn't exist.
- Also disable all repo units except code, as they mostly aren't needed
for private repos and can be easily enabled on-demand.
