Update the tinyMce for nopCommerce

To fix the bug of table css in product full description, I add a plugin in tinyMCE as below:

To add the Fullpage Plugin to the tinyMCE editor just edit:

/Administration/Views/Shared/EditorTemplates/RichEditor.cshtml

And add “fullpage” to plugins: [..] and also to toolbar: “..”

inymce.init({
        selector: "#@ViewData.TemplateInfo.GetFullHtmlFieldId(string.Empty)",
        height: 350,
        width: 790,
        valid_children : "+body[style],-body[div],p[strong|a|#text]",
        plugins: [
            "advlist autolink lists link image charmap print preview anchor",
            "searchreplace visualblocks code fullscreen fullpage",
            "insertdatetime media table contextmenu paste@(canUploadPictures ? " jbimages" : null)"
        ],
        toolbar: "insertfile undo redo | styleselect | bold italic | alignleft aligncenter alignright alignjustify | bullist numlist outdent indent | link image@(canUploadPictures ? " jbimages" : null) | fullpage",
        //"relative_urls" required by jbimages plugin to be set to "false"
        //but in this case it'll break existing links (e.g. message template tokens)
        relative_urls: true