Sitecore WFFM Email Field with Placeholder Text

EmailPlaceholder.cs

using System.ComponentModel;
using Sitecore.Form.Core.Attributes;

namespace MyProject.CMS.Custom.WFFM.Fields
{
    public class EmailPlaceholder : Sitecore.Form.Web.UI.Controls.Email
    {
        public new string Text
        {
            get { return this.textbox.Text; }
            set { this.textbox.Text = value; }
        }

        [DefaultValue("")]
        [VisualCategory("Appearance")]
        [VisualProperty("Placeholder Text:", 200)]
        [Localize]
        public string PlaceholderText { get; set; }
    }
}

EmailPlaceholderField.cs

using System.ComponentModel;
using Sitecore.Forms.Mvc.ViewModels.Fields;

namespace MyProject.CMS.Custom.WFFM.Fields
{
    public class EmailPlaceholderField : EmailField
    {
        [DefaultValue("")]
        public string PlaceholderText { get; set; }
    }
}

EmailPlaceholderField.cshtml

@using Sitecore.Forms.Mvc.Html
@model MyProject.CMS.Custom.WFFM.Fields

@using (Html.BeginField())
{
    @Html.Editor("Value", new { FieldModel = Model, htmlAttributes = new { placeholder = Model.PlaceholderText } })
}