private async void ToolbarItem_Add_Activated(object sender, EventArgs e)
        {
            var SettingsForm_ServerAddressAddEdit = new SettingsForm_ServerAddressAddEdit("", false, this)
            {
                StartColor = Color.FromHex("E6EBEF"),
                EndColor   = Color.FromHex("A6CFED")
            };

            await this.Navigation.PushAsync(SettingsForm_ServerAddressAddEdit);
        }
 private async void ToolbarItem_Edit_Activated(object sender, EventArgs e)
 {
     if (LastSelectedAddress != null)
     {
         var SettingsForm_ServerAddressAddEdit = new SettingsForm_ServerAddressAddEdit(((ServerAddressModel)LastSelectedAddress).Address, true, this)
         {
             StartColor = Color.FromHex("E6EBEF"),
             EndColor   = Color.FromHex("A6CFED")
         };
         await this.Navigation.PushAsync(SettingsForm_ServerAddressAddEdit);
     }
 }