Align textarea in diff comment

Summary: Better aligns the text area when leaving an inline comment. Also, phts

Test Plan: reload page, view new padding.

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D8370
Normalize spacing around empty object lists

Summary: Adds an li for semantics, fixes spacing around error view in a phui-box or not

Test Plan: view a project with no tasks, perform a search with no data returned.

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D8371
Reduce "beta" UI in the sidenav

Summary: Removes much of the UI around the beta logo.

Test Plan: test large and small tiles

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D8372
Fix two issues with ref discovery

Summary:
See IRC. I'm having trouble figuring out what's going on with b4taylor's report, but fix two possible issues:

  # The commit query is missing a `repositoryID`, which could cause issues if you import two copies of the same repository.
  # I think we may try to close commits on untracked branches right now, as long as they aren't excluded by other autoclose rules.

Test Plan: Ran `bin/repository refs` on a few repos.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran, brennantaylor

Differential Revision: https://secure.phabricator.com/D8373
Reduce initial discovery from O(branches * commits) to O(commits)

Summary:
Fixes T4414. Currently, when we discover a new repository, we do something like this:

  foreach (branch) {
    foreach (commit on this branch) {
      do_something();
    }
  }

In cases where there are a lot of branches which mostly just branch `master`, this leads to us doing roughly `O(branches * commits)` work.

We have a `commitCache` to prevent this, but it has two problems:

  - It only fills out of the DB, and we do this whole thing before writing to the DB, which is the entire point.
  - It has a fixed size (2048) and on initial discovery we're usually dealing with way more commits than that.

Instead, also stop doing work if we hit a commit which is known already.

Test Plan:
  - Added `print` on the number of discovered refs and number of unique refs.
  - Ran `bin/repository discover --repair X` on a repo with several branches.
  - Before the patch, got 397 refs and 135 unique refs.
  - After the patch, got 135 refs and 135 unique refs.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T4414

Differential Revision: https://secure.phabricator.com/D8374
Produce a more tailored checkout URI for Subversion

Summary:
For imported SVN repositories with an "Import Only" path, we produce a `/path/to/root/` URI, but should produce `/path/to/root/then/to/import/only/`.

As it is, the URI instructs the user to check out the whole repository.

Also, don't show the "Clone As" fragment in the URI for remote repositories, and prevent it from being edited for nonhosted repositories. This is generally more consistent with user expectation.

Test Plan:
  - Created a remote SVN repository with "Import Only", saw path include it.
  - Verified no "Clone As" options, no "Clone As" in URI.
  - Switched it to hosted, saw "Clone As" options appear and work properly.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran, staticshock

Differential Revision: https://secure.phabricator.com/D8375