Add FontIcon bridge to AppIcons

Summary: Select a similar or better FontAwesome icon to represent each application

Test Plan: Visual inspection

Reviewers: epriestley, btrahan

Subscribers: hach-que, Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11489

src/applications/oauthserver/application/PhabricatorOAuthServerApplication.php

@@ -18,6 +18,10 @@ final class PhabricatorOAuthServerApplication extends PhabricatorApplication {
     return 'oauthserver';
   }
 
+  public function getFontIcon() {
+    return 'fa-hotel';
+  }
+
   public function getTitleGlyph() {
     return "\xE2\x99\x86";
   }