 
         webView.backgroundColor = .clear
         webView.delegate = self
-        webView.addObserver(self, forKeyPath: IssueCommentHtmlCell.WebviewKeyPath, options: [.new], context: nil)
 
         let scrollView = webView.scrollView
         scrollView.scrollsToTop = false

    override func layoutSubviews() {
        super.layoutSubviews()
        if webView.frame != contentView.bounds {
            webView.frame = contentView.bounds
        }
    }

}

final class IssueCommentHtmlCell: IssueCommentBaseCell, ListBindable, UIWebViewDelegate {

    private static let ImgScheme = "freetime-img"
    private static let htmlHead = """
