Added zip support to file viewer.

FileDialogMsgForm.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace MeshCentralRouter
+{
+    public partial class FileDialogMsgForm : Form
+    {
+        private FileViewer xparent = null;
+
+        public FileDialogMsgForm(FileViewer xparent)
+        {
+            this.xparent = xparent;
+            InitializeComponent();
+            Translate.TranslateControl(this);
+        }
+
+        public void UpdateStatus(string msg, string file, int progress)
+        {
+            if (msg != null) { mainLabel1.Text = msg; } else { mainLabel1.Text = ""; }
+            if (file != null) { mainLabel2.Text = file; } else { mainLabel2.Text = ""; }
+            if ((progress >= 0) && (progress <= 100)) { progressBar1.Value = progress; }
+        }
+
+        private void cancelButton_Click(object sender, EventArgs e)
+        {
+            xparent.requestCancel();
+        }
+    }
+}