[skip ci] Update type hints for JsUtils and view parameters

Refactored method signatures in BaseGui, BaseComponent, and BaseHtml to use nullable and mixed type hints for JsUtils and view parameters, improving type safety and compatibility with PHP 7.1+.

Author: jcheron

Ajax/common/BaseGui.php

@@ -80,7 +80,7 @@ public function addHtmlComponent(BaseHtml $htmlComponent) {
 		return $htmlComponent;
 	}
 
-	public function compileHtml(JsUtils $js = NULL, &$view = NULL) {
+	public function compileHtml(?JsUtils $js = NULL, mixed &$view = NULL) {
 		foreach ($this->htmlComponents as $htmlComponent) {
 			$htmlComponent->compile($js, $view);
 		}

Ajax/common/components/BaseComponent.php

@@ -19,7 +19,7 @@ abstract class BaseComponent {
 	 */
 	protected $js;
 
-	public function __construct(JsUtils $js=NULL) {
+	public function __construct(?JsUtils $js=NULL) {
 		$this->js=$js;
 	}
 

Ajax/common/html/BaseHtml.php

@@ -56,7 +56,7 @@ private function _callSetter($setter, $key, $value, &$array) {
 		return $result;
 	}
 
-	protected function getTemplate(JsUtils $js = NULL, $view = null) {
+	protected function getTemplate(?JsUtils $js = NULL, mixed $view = null): string {
 		return PropertyWrapper::wrap($this->_wrapBefore, $js, $view) . $this->_template . PropertyWrapper::wrap($this->_wrapAfter, $js, $view);
 	}