J-BusinessDirectory - Adding a timestamp to messages

Hi Guys, 

Is there a way to add a timestamp to messages (administrator/index.php?option=com_jbusinessdirectory&view=messages) so when you look at them in J-business Directory you can tell when they have been added?

It makes sense these are timestamped so you're able to see how long ago an enquiry was made. 

Yes thats good and also a column for listing messages type ie Listing messages, Offer messages, Event messages.

What I really want is also a notification for the left column of Dashboard "Messages" like:

"Messages 2 (5)" where the no 2 is a new mesaga(es) in red colour if not read and new and number (5) black shows the total of messages. If you read/open this messages list next time it show 0 in black and 0 (5) black.