Revert unneeded changes from "Fixes for nested multipliers (#59)"

This partially reverts commit 39725d3,
only keeping the part relevant for nested support and a PHPUnit deprecation fix.

The commit introduced a regression in `testGroupManualRenderWithButtons`
so this will minimize the changes that could affect it.

For reference, the reverted change is the following commit that was squashed
into 39725d3, except for the change to `testSendNested`:
2c33de2

Author: jtojnar

src/Latte/Extension/MultiplierExtension.php

@@ -20,8 +20,6 @@ public function getTags(): array
 			'n:multiplier' => [MultiplierNode::class, 'create'],
 			'multiplier:remove' => [MultiplierRemoveNode::class, 'create'],
 			'multiplier:add' => [MultiplierAddNode::class, 'create'],
-			'btnRemove' => [MultiplierRemoveNode::class, 'create'],
-			'btnCreate' => [MultiplierAddNode::class, 'create'],
 		];
 	}
 

tests/unit/CreateButtonTest.php

@@ -89,11 +89,7 @@ public function testCallback()
 				$submitter->setHtmlAttribute('class', 'add-btn');
 			});
 
-		$response = $this->services->form->createRequest($factory
-			->formModifier(function (\Nette\Application\UI\Form $form) {
-				$form->onSuccess[] = $form->onError[] = $form->onSubmit[] = function () {
-				};
-			})->createForm())->setPost([
+		$response = $this->services->form->createRequest($factory->createForm())->setPost([
 			'm' => [
 				['bar' => ''],
 				['bar' => ''],

tests/unit/MultiplierTest.php

@@ -44,10 +44,6 @@ public function testSendBase()
 						$this->parameters['onCreate'][] = $container;
 					};
 				})
-				->formModifier(function (Form $form) {
-					$form->onSuccess[] = $form->onError[] = $form->onSubmit[] = function () {
-					};
-				})
 				->createForm()
 		)
 			->setPost($params = [
@@ -97,10 +93,6 @@ public function testSendCopy2()
 						$this->parameters['onCreate'][] = $container;
 					};
 				})
-				->formModifier(function (Form $form) {
-					$form->onSuccess[] = $form->onError[] = $form->onSubmit[] = function () {
-					};
-				})
 				->createForm()
 		)
 			->setPost($params = [
@@ -151,10 +143,6 @@ public function testSendMaxCopy()
 						$this->parameters['onCreate'][] = $container;
 					};
 				})
-				->formModifier(function (Form $form) {
-					$form->onSuccess[] = $form->onError[] = $form->onSubmit[] = function () {
-					};
-				})
 				->createForm()
 		)
 			->setPost([
@@ -221,10 +209,6 @@ public function testSendNested()
 					}));
 					$container['m2']->addCreateButton('create');
 				})
-				->formModifier(function (Form $form) {
-					$form->onSuccess[] = $form->onError[] = $form->onSubmit[] = function () {
-					};
-				})
 				->createForm()
 		);
 		$request->setPost([
@@ -319,15 +303,14 @@ public function testGroupManualRenderWithButtons()
 			->multiplierModifier(function (Multiplier $multiplier) {
 				$multiplier->onCreate[] = function (Container $container) {
 					$this->parameters['onCreate'][] = $container;
-					$container->setParent(null, 'X');
-					//var_dump($container);
 				};
 				$multiplier->addCreateButton();
 				$multiplier->addRemoveButton();
-				//$multiplier->setMinCopies(1);
+				$multiplier->setMinCopies(1);
 			})
 			->createForm());
 		$dom = $request->render(__DIR__ . '/templates/group.latte')->toDomQuery();
+
 		$this->assertDomHas($dom, 'input[name="m[0][multiplier_remover]"]');
 		$this->assertDomHas($dom, 'input[name="m[1][multiplier_remover]"]');
 	}
@@ -396,10 +379,6 @@ public function testPromptSelect()
 						->setPrompt('Select');
 				})
 				->addCreateButton()
-				->formModifier(function (Form $form) {
-					$form->onSuccess[] = $form->onError[] = $form->onSubmit[] = function () {
-					};
-				})
 				->createForm()
 		)
 			->setPost($params = [

tests/unit/RemoveButtonTest.php

@@ -188,10 +188,6 @@ public function testAddClass()
 					$submitter->setHtmlAttribute('class', 'btn btn-remove');
 				})
 				->addCreateButton()
-				->formModifier(function (Form $form) {
-					$form->onSuccess[] = $form->onError[] = $form->onSubmit[] = function () {
-					};
-				})
 				->createForm()
 		)->setPost([
 			'm' => [
@@ -214,10 +210,6 @@ public function testDeleteLastElementToZero()
 				->setMinCopies(0)
 				->addRemoveButton()
 				->addCreateButton()
-				->formModifier(function (Form $form) {
-					$form->onSuccess[] = $form->onError[] = $form->onSubmit[] = function () {
-					};
-				})
 				->createForm()
 		)->modifyForm(function (Form $form) {
 			$form['m']->setValues([
@@ -247,10 +239,6 @@ public function testOnRemoveEvent()
 						$called = true;
 					};
 				})
-				->formModifier(function (Form $form) {
-					$form->onSuccess[] = $form->onError[] = $form->onSubmit[] = function () {
-					};
-				})
 				->createForm()
 		)->setPost([
 			'm' => [