- Added multi-part by default to forms

- Fixed some bug within FormContext and FormHandler.

src/Method/Form.php

@@ -29,8 +29,6 @@ class Form implements Extension {
 
     public function register(Context $context) : void
     {
-        $this->formContext = new FormContext($this->request);
-        
         $context->pushFunction("form", [ $this, 'formClass' ]);
     }
 
@@ -52,6 +50,6 @@ class Form implements Extension {
 
     public function formClass(FormInterface $form, ? FormContext $formContext = null) : FormHandler
     {
-        return new FormHandler($this->request, $form, $formContext ?: $this->formContext);
+        return new FormHandler($this->request, $form, $formContext ?? $this->formContext ?? null);
     }
 }