Skype and Slack provides deletion of message via the ellipses button and editing of message by pressing the arrow up on your keyboard (also available on ellipses button).
This is very convenient and I think it's not exclusive to Skype nor Slack.
Hi Jery - The best place to make suggestions to Atlassian is at https://jira.atlassian.com.
Most people on here are just users like you and me, so Atlassian may or may not see your suggestion.
This one sounds like the the feature you'd like, so I'd recommend commenting, watching or voting on it: https://jira.atlassian.com/browse/HCPUB-2209
Atlernatively, have a look at the all suggestions for HipChat at https://jira.atlassian.com/browse/HCPUB or make your own.
Atlassian Summit is an excellent opportunity for in-person support, training, and networking.Learn more
...from the beginning. We have built up a lot of content in HipChat, with it being a core tool in our distributed company model. While it is true that we didn’t need to move to Slack immediately, we felt it...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs