Move FontIcon calls to Icon

Summary: Normalizes all `setFontIcon` calls to `setIcon`.

Test Plan: UIExamples, Almanac, Apps list, etc.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, hach-que, yelirekim

Differential Revision: https://secure.phabricator.com/D15129

src/applications/spaces/application/PhabricatorSpacesApplication.php

@@ -14,7 +14,7 @@ final class PhabricatorSpacesApplication extends PhabricatorApplication {
     return pht('Policy Namespaces');
   }
 
-  public function getFontIcon() {
+  public function getIcon() {
     return 'fa-th-large';
   }
 

src/applications/spaces/query/PhabricatorSpacesNamespaceSearchEngine.php

@@ -105,7 +105,7 @@ final class PhabricatorSpacesNamespaceSearchEngine
       ->setHref('/spaces/create/')
       ->setColor(PHUIButtonView::GREEN);
 
-    $icon = $this->getApplication()->getFontIcon();
+    $icon = $this->getApplication()->getIcon();
     $app_name =  $this->getApplication()->getName();
     $view = id(new PHUIBigInfoView())
       ->setIcon($icon)