Fixes menu displaying for admins & deans

Ternary operator is left-associated in PHP (right in C++), so we have:
    (...) ? one : second;

I have put an extra braces to improve the evaluation order.

~dev_rating/application/classes/Controller/Environment/Office.php

@@ -15,11 +15,11 @@ class Controller_Environment_Office extends Controller_Environment_User
 
         // todo: move to twig
         $menu = Model_System::loadConfig(
-            $this->user->isAdmin()
-                ? 'sidePanel/admin.json'
-            : $this->user->isDean()
-                ? 'sidePanel/dean.json'
-            : []);
+            $this->user->isAdmin() ?
+                'sidePanel/admin.json' : (
+            $this->user->isDean() ?
+                'sidePanel/dean.json' : []
+            ));
 
         $this->twig->set_global('SidePanel', $menu);
     }