Don't render anything on project homepages if there are no properties at all

Summary: Ref T10054.

Test Plan:
{F1068420}

Also looked at a project which did have stuff to make sure the stuff still worked.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10054

Differential Revision: https://secure.phabricator.com/D15102

src/applications/project/controller/PhabricatorProjectProfileController.php

@@ -31,6 +31,7 @@ final class PhabricatorProjectProfileController
     }
 
     $properties = $this->buildPropertyListView($project);
+
     $watch_action = $this->renderWatchAction($project);
     $header->addActionLink($watch_action);
 
@@ -119,6 +120,10 @@ final class PhabricatorProjectProfileController
       PhabricatorCustomField::ROLE_VIEW);
     $field_list->appendFieldsToPropertyList($project, $viewer, $view);
 
+    if ($view->isEmpty()) {
+      return null;
+    }
+
     $view = id(new PHUIBoxView())
       ->setColor(PHUIBoxView::GREY)
       ->appendChild($view)

src/view/phui/PHUIPropertyListView.php

@@ -115,6 +115,16 @@ final class PHUIPropertyListView extends AphrontView {
     $this->invokedWillRenderEvent = true;
   }
 
+  public function isEmpty() {
+    $this->invokeWillRenderEvent();
+
+    if ($this->parts) {
+      return false;
+    }
+
+    return true;
+  }
+
   public function render() {
     $this->invokeWillRenderEvent();