Completely uninstall beta applications

Summary: Fixes T2357. In D4529, I recommended we just hide tiles for beta applications on installs without beta apps enabled. However, this creates at least a couple of issues, notably the stuff in T2357. The main app I was concerned wih Config, which we ended up un-beta'ing anyway, so I think this will probably solve more problems than it creates.

Test Plan: Verified routes for beta applications dropped out when beta was disabled. Verified "Customize Applications" no longer shows these applications.

Reviewers: ljalonen, chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T2357

Differential Revision: https://secure.phabricator.com/D4546

src/applications/base/PhabricatorApplication.php

@@ -204,6 +204,9 @@ abstract class PhabricatorApplication {
   public static function getAllInstalledApplications() {
     static $applications;
 
+    $show_beta =
+      PhabricatorEnv::getEnvConfig('phabricator.show-beta-applications');
+
     if (empty($applications)) {
       $classes = id(new PhutilSymbolLoader())
         ->setAncestorClass(__CLASS__)
@@ -216,6 +219,11 @@ abstract class PhabricatorApplication {
         if (!$app->isEnabled()) {
           continue;
         }
+
+        if (!$show_beta && $app->isBeta()) {
+          continue;
+        }
+
         $apps[] = $app;
       }
       $applications = $apps;