Show only recent open revisions affecting the same files

Summary: Fixes T5658. Over a long period of time, some cruft can build up here. Only show revisions which have been updated in the last 30 days.

Test Plan:
  - Viewed panel in Differential and Diffusion.
  - Changed limit from 30 days to 30 seconds and saw no revisions.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5658

Differential Revision: https://secure.phabricator.com/D12158

src/applications/diffusion/controller/DiffusionBrowseController.php

@@ -192,10 +192,13 @@ abstract class DiffusionBrowseController extends DiffusionController {
       return null;
     }
 
+    $recent = (PhabricatorTime::getNow() - phutil_units('30 days in seconds'));
+
     $revisions = id(new DifferentialRevisionQuery())
       ->setViewer($user)
       ->withPath($repository->getID(), $path_id)
       ->withStatus(DifferentialRevisionQuery::STATUS_OPEN)
+      ->withUpdatedEpochBetween($recent, null)
       ->setOrder(DifferentialRevisionQuery::ORDER_PATH_MODIFIED)
       ->setLimit(10)
       ->needRelationships(true)
@@ -207,8 +210,13 @@ abstract class DiffusionBrowseController extends DiffusionController {
       return null;
     }
 
+    $header = id(new PHUIHeaderView())
+      ->setHeader(pht('Open Revisions'))
+      ->setSubheader(
+        pht('Recently updated open revisions affecting this file.'));
+
     $view = id(new DifferentialRevisionListView())
-      ->setHeader(pht('Pending Differential Revisions'))
+      ->setHeader($header)
       ->setRevisions($revisions)
       ->setUser($user);