Fix Pjax container

If we set client option "container", it will be ignored, because param "container" of function always set.

framework/widgets/Pjax.php

@@ -181,15 +181,18 @@ class Pjax extends Widget
         $this->clientOptions['replace'] = $this->enableReplaceState;
         $this->clientOptions['timeout'] = $this->timeout;
         $this->clientOptions['scrollTo'] = $this->scrollTo;
+        if(!isset($this->clientOptions['container'])) {
+            $this->clientOptions['container'] = "#$id";
+        }
         $options = Json::htmlEncode($this->clientOptions);
         $js = '';
         if ($this->linkSelector !== false) {
             $linkSelector = Json::htmlEncode($this->linkSelector !== null ? $this->linkSelector : '#' . $id . ' a');
-            $js .= "jQuery(document).pjax($linkSelector, \"#$id\", $options);";
+            $js .= "jQuery(document).pjax($linkSelector, $options);";
         }
         if ($this->formSelector !== false) {
             $formSelector = Json::htmlEncode($this->formSelector !== null ? $this->formSelector : '#' . $id . ' form[data-pjax]');
-            $js .= "\njQuery(document).on('submit', $formSelector, function (event) {jQuery.pjax.submit(event, '#$id', $options);});";
+            $js .= "\njQuery(document).on('submit', $formSelector, function (event) {jQuery.pjax.submit(event, $options);});";
         }
         $view = $this->getView();
         PjaxAsset::register($view);