Add an option such that, if a channel has any unread messages, a badge will appear in the sidebar for that channel that indicates the number of unread messages. For my team, there can be a lot of activity across at least a handful of channels. It'd be amazing if a badge could appear next to each channel when there are unread messages so that I know how many there are in that channel. It'd be super helpful for triaging messages. To know if there's a little new activity in that channel, or a ton of new activity that I'm missing. If there's a lot of activity in that channel and it keeps building, there may be a small fire somewhere and I should check in on that channel's traffic sooner than later.