Minor improvements to Applications application

Summary:
I missed these in review, but here are a couple of tweaks:

  - Call `setWorkflow(true)` on the actions. This makes the dialogs pop up on the same page with Javascript if it's available.
  - When the user installs/uninstalls an application, send them back to the application's detail page, not the application list.

Test Plan:
  - Uninstalled an application (saw dialog, got sent back to detail page).
  - Installed an application (saw dialog, got sent back to detail page).
  - Canceled an application uninstall.

Reviewers: Afaque_Hussain

Reviewed By: Afaque_Hussain

CC: aran

Differential Revision: https://secure.phabricator.com/D4762

src/applications/meta/controller/PhabricatorApplicationUninstallController.php

@@ -21,14 +21,16 @@ final class PhabricatorApplicationUninstallController
       return new Aphront404Response();
     }
 
+    $view_uri = $this->getApplicationURI('view/'.$this->application);
+
     if ($request->isDialogFormPost()) {
       $this->manageApplication();
-     return id(new AphrontRedirectResponse())->setURI('/applications/');
+      return id(new AphrontRedirectResponse())->setURI($view_uri);
     }
 
     $dialog = id(new AphrontDialogView())
                ->setUser($user)
-               ->addCancelButton('/applications/view/'.$this->application);
+               ->addCancelButton($view_uri);
 
     if ($this->action == 'install') {
       if ($selected->canUninstall()) {