Touch up PHP/JS interactions for inline comments

Summary:
Ref T1460. Overall:

  - Pass `objectOwnerPHID` consistently.
  - Pass viewer consistently.
  - Set the correct draft state for checkboxes on the client.

Test Plan:
  - Made inline comments in Differential.
  - Made inline comments in Diffusion.

Reviewers: chad

Reviewed By: chad

Subscribers: epriestley

Maniphest Tasks: T1460

Differential Revision: https://secure.phabricator.com/D12186

src/applications/diffusion/controller/DiffusionBrowseFileController.php

@@ -845,7 +845,11 @@ final class DiffusionBrowseFileController extends DiffusionBrowseController {
 
     $rows = array();
     foreach ($inlines as $inline) {
+
+      // TODO: This should use modern scaffolding code.
+
       $inline_view = id(new PHUIDiffInlineCommentDetailView())
+        ->setUser($this->getViewer())
         ->setMarkupEngine($engine)
         ->setInlineComment($inline)
         ->render();