- Set formSent() public on FormHandler class

- Fixed class attributes on form which was overwritting it instead of adding to base class

src/Form/UiForm.php

@@ -57,6 +57,12 @@ class UiForm extends UiElement implements Extension {
         
         $this->option('tag-type', 'single');
         
+
+        if ($attributes['class'] ?? false) {
+            $attributes['class'] .= " {$this->attributes['class']}";
+            unset($this->attributes['class']);
+        }
+        
         $this->attributes([ 'method' => $method, 'action' => $action ] + $attributes);
         
         if ( $method !== "get" ) {