R1:a0e820ad9a2e

Improve repository hinting and feedback

Summary:
- Warn about "Read/Write" instead of disabling it, to prevent edits which mutate it after changing a hosted repository to an unhosted one.
- Warn about authenticated connections with HTTPS auth disabled, and link to the relevant setting.
- When "Autoclose" is disabled, show that "Autoclose Branches" won't have an effect.
- For hosted repositories, show the HTTP and SSH clone URIs.
- Make them easy to copy/paste.
- Link to credential…