remove garbage headers in reply message

Very important fix. Remove garbage from reply message headers. Till
now all Original fields were send in reply, which we do not want and could
lead to uncorrect email message.

widgets/compose.go

@@ -469,7 +469,8 @@ func (c *Composer) PrepareHeader() (*mail.Header, []string, error) {
 	// Merge in additional headers
 	txthdr := mhdr.Header
 	for key, value := range c.defaults {
-		if !txthdr.Has(key) && value != "" {
+		// skip all Original* defaults, they contain info about original message
+		if !txthdr.Has(key) && value != "" && !strings.HasPrefix(key, "Original") {
 			mhdr.SetText(key, value)
 		}
 	}