OUT-789: Take into account files without extension. Remove space.

PEPAttachment.cs

@@ -1083,8 +1083,15 @@ namespace pEp
                     try
                     {
                         var fileParts = this.FileName.Split('.');
-                        normalizedFileName = string.Join("", new ArraySegment<string>(fileParts, 0, fileParts.Length - 1));
-                        normalizedFileName += " (" + counter++ + ")." + fileParts.Last();
+                        if (fileParts.Length > 1)
+                        {
+                            normalizedFileName = string.Join("", new ArraySegment<string>(fileParts, 0, fileParts.Length - 1));
+                            normalizedFileName += "(" + counter++ + ")." + fileParts.Last();
+                        }
+                        else
+                        {
+                            normalizedFileName = this.FileName + "(" + counter++ + ")";
+                        }
                     }
                     catch (Exception ex)
                     {