Fix issues with filter registration appearing after latte/latte upd…

…ate to version `2.11.5`.

Originally latte searched for filter implementation by searching the registered callback
with lower-cased title of the filter. This version changed that and used original name
of the filter that was used for the registration.

This caused some of our filters to stop working. Main fix is in FilterLoader class.

remp/crm#2511

(cherry picked from commit 5de85e934982e4fc24457f062c6d352a60035d77)

src/Helpers/FilterLoader.php

@@ -2,8 +2,6 @@
 
 namespace Crm\ApplicationModule\Helpers;
 
-use Nette\Utils\Strings;
-
 class FilterLoader
 {
     /** @var array All registered filters */
@@ -22,6 +20,6 @@ public function load(string $helper)
 
     public function register(string $name, callable $callback)
     {
-        $this->filters[Strings::lower($name)] = $callback;
+        $this->filters[$name] = $callback;
     }
 }