title: textarea_html not working with Visual Composer
body: <p>I use WordPress 4.9.2 with Visual Composer 5.1
  I want to add text editor on VC but it is not working </p>
  
  <pre><code>vc_map( array(
      "name" =&gt; esc_html__("SNS Test",'themeles'),
      "base" =&gt; "sns_test",
      "icon" =&gt; "sns_icon_test",
      "class" =&gt; "sns_test",
      "category" =&gt; esc_html__("SNS Test",'themeles'),
      "description" =&gt; esc_html__( "test ",'themeles' ),
      "params" =&gt; array(
            array(
              "type" =&gt; "textarea_html",
              "class" =&gt; "",
              "heading" =&gt; esc_html__("Description",'snsanton'),
              "param_name" =&gt; "product_excerpt",
              "value" =&gt; "",
              "description" =&gt; esc_html__("Custom the description for the 
                product.", 'snsanton'),
          ),
        .....
    ));
  </code></pre>
  
  <p>text doesn't save HTML not working like strong or I</p>