Minor UI updates

Removed decimal point on file sizes. Reordered the tab indices for key creation.

Author: EvanHei

WinFormsUI/Forms/CreateKeyPairForm.Designer.cs

@@ -278,7 +278,7 @@ private string FormatBytes(int bytes)
         for (i = 0; Math.Round(dblBytes / 1024) >= 1; i++)
             dblBytes /= 1024;
 
-        return $"{dblBytes:n1} {suffixes[i]}";
+        return $"{(int)dblBytes} {suffixes[i]}";
     }
 
     private void AddButton_MouseDown(object sender, MouseEventArgs e)