in list of open tickets make a short mark "replied"

[vplotvinov]

Hi! Sometime, when you are working with a lot tickets. It can be helpful if add in list with /open tickets a "replied" mark.

Kind of this /open #T000529 replied #T000531 replied #T000537 #T000552 replied #T000553 #T000554 #T000556 #T000559 replied #T000560 #T000561

In case when you are waiting answer of user with extra details and working looking for another "not answerd" ticket.

I will try to prepare PR with feature on next week. (I hope I will have enough time), but know want to make a suggestion only.