Slack 4.2.0

Our newest, fastest, best-performing, shiniest, most nutritious and delicious version of Slack is now fully rolled out, so that's the one you're now using. Brilliant. Like zooming in and out? Use a numpad? Great news. You can now do these things, on that. Notifications looked weird if your workspace name was long. Now, no matter your team name, notifications look lovely. Some messages were being marked as read when Slack was hidden behind applications, or not visible on screen. Now we won't mark it as read until you've actually seen it. Which seems fair. Using three finger swipes to navigate channel history on touchpad now works again. And for those who never knew it could work in the first place: it does!