Various code optimalisations.

app/Http/Controllers/Admin/ConfigurationController.php

@@ -18,6 +18,7 @@
  * You should have received a copy of the GNU General Public License
  * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
  */
+/** @noinspection PhpUndefinedClassInspection */
 declare(strict_types=1);
 
 namespace FireflyIII\Http\Controllers\Admin;