Please allow multiple logins on desktop app

I’m tired of logging into the battle.net launcher app on my laptop only to get disconnected from the launcher on my desktop. I want to be able to interact with all of the features on the app that have nothing to do with actually playing a game. Why can’t I message my friends on whatever system I’m on?

There’s no limitation with being logged into the mobile app while logged into the desktop app. Why not log into the desktop app in two locations as well?