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.
...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...
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