fix: correct format log files

 - correct format of "save chat log"
 - add date like in chat
 - correct type dialog for export dialog

src/chatlog/chatmessage.cpp

@@ -124,7 +124,7 @@ ChatMessage::Ptr ChatMessage::createChatInfoMessage(const QString& rawMessage,
 
     msg->addColumn(new Image(QSize(18, 18), img),
                    ColumnFormat(NAME_COL_WIDTH, ColumnFormat::FixedSize, ColumnFormat::Right));
-    msg->addColumn(new Text("<b>" + text + "</b>", baseFont, false, ""),
+    msg->addColumn(new Text("<b>" + text + "</b>", baseFont, false, text),
                    ColumnFormat(1.0, ColumnFormat::VariableSize, ColumnFormat::Left));
     msg->addColumn(new Timestamp(date, Settings::getInstance().getTimestampFormat(), baseFont),
                    ColumnFormat(TIME_COL_WIDTH, ColumnFormat::FixedSize, ColumnFormat::Right));

src/widget/form/chatform.cpp

@@ -1087,11 +1087,12 @@ void ChatForm::onExportChat()
 
     QString buffer;
     for (const auto& it : msgs) {
-        QString timestamp = it.timestamp.toString();
+        QString timestamp = it.timestamp.time().toString("hh:mm:ss");
+        QString datestamp = it.timestamp.date().toString("yyyy-MM-dd");
         ToxPk authorPk(ToxId(it.sender).getPublicKey());
         QString author = getMsgAuthorDispName(authorPk, it.dispName);
 
-        QString line = QString("%1\t%2\t%3\n").arg(timestamp, author, it.message);
+        QString line = QString("%1\t%2\t%3\t%4\n").arg(datestamp, timestamp, author, it.message);
         buffer = buffer % line;
     }
     file.write(buffer.toUtf8());

src/widget/form/genericchatform.cpp

@@ -494,17 +494,16 @@ void GenericChatForm::onSaveLogClicked()
     for (ChatLine::Ptr l : lines) {
         Timestamp* rightCol = qobject_cast<Timestamp*>(l->getContent(2));
 
-        if (!rightCol)
-            break;
-
         ChatLineContent* middleCol = l->getContent(1);
         ChatLineContent* leftCol = l->getContent(0);
 
-        QString timestamp = rightCol->getTime().isNull() ? tr("Not sent") : rightCol->getText();
-        QString nick = leftCol->getText();
+        QString nick = leftCol->getText().isNull() ? tr("[System message]") : leftCol->getText();
+
         QString msg = middleCol->getText();
 
-        plainText += QString("[%2] %1\n%3\n\n").arg(nick, timestamp, msg);
+        QString timestamp = (rightCol == nullptr) ? tr("Not sent") : rightCol->getText();
+
+        plainText += QString("%1\t%3\t%2\n").arg(nick, timestamp, msg);
     }
 
     file.write(plainText.toUtf8());