Project - add ability to select an icon for typeaheads and such

Summary: Fixes T5090. Introduced getIcon into Handle stack which allows you to specify a per handle icon. getIcon falls back ot getTypeIcon.

Test Plan: changed the icon on a project a bunch. verified transactions showed up. verified icon showed up in typeahead. verified icon showed up in tokens that were pre-generated (not typed in). units test passed.

Reviewers: chad, epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5090

Differential Revision: https://secure.phabricator.com/D9264

src/applications/project/controller/PhabricatorProjectEditMainController.php

@@ -94,6 +94,14 @@ final class PhabricatorProjectEditMainController
         ->setDisabled(!$can_edit)
         ->setWorkflow(!$can_edit));
 
+    $view->addAction(
+      id(new PhabricatorActionView())
+        ->setName(pht('Edit Icon'))
+        ->setIcon($project->getIcon())
+        ->setHref($this->getApplicationURI("icon/{$id}/"))
+        ->setDisabled(!$can_edit)
+        ->setWorkflow(true));
+
     $view->addAction(
       id(new PhabricatorActionView())
         ->setName(pht('Edit Picture'))