Move various other callsites away from callsigns

Summary: Ref T4245. These mostly relate to building URIs.

Test Plan: Tried to hunt down as many of these in the UI as I could. Some are a bit tricky but they should be low-risk.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T4245

Differential Revision: https://secure.phabricator.com/D14933

src/applications/repository/query/PhabricatorRepositorySearchEngine.php

@@ -177,7 +177,7 @@ final class PhabricatorRepositorySearchEngine
       if ($size) {
         $history_uri = DiffusionRequest::generateDiffusionURI(
           array(
-            'callsign' => $repository->getCallsign(),
+            'repository' => $repository,
             'action' => 'history',
           ));