R1:0b5ab2330d99

Hide irrelevant panels in Mercurial/Subversion, fix Subversion URIs

Summary:
Ref T10923.

- Hide "Automation", "Staging" and "Branches" in repositories where they do nothing.
- Fix SVN SSH URIs to read "svn+ssh://" and have proper paths.

Test Plan:
- Verified irrelevant sections did not appear in Subversion in Manage UI.
- Checked out a new hosted SVN repository.

Reviewers: chad, avivey

Reviewed By: avivey

Maniphest Tasks: T10923

Differential Revision: https://secure.phabricator.com/D15874