Increase in keylogger form constructor

Now we actually use the ListViewItem object we create on every iteration
instead of creating one and only passing the string property value. ~38%
speed increase each iteration on DEBUG and RELEASE configurations.

Server/Forms/FrmKeylogger.cs

@@ -40,7 +40,7 @@ namespace xServer.Forms
 
                 foreach (FileInfo file in iFiles)
                 {
-                    lstLogs.Items.Add(new ListViewItem().Text = file.Name);
+                    lstLogs.Items.Add(new ListViewItem() { Text = file.Name });
                 }
             }
         }