I'm using Slack as an application shortcut through Google Chrome. It appears that unity uses the web's favicon for the launcher icon, which is neat. However, it seems to cache the icon for an unknown (to me) time.
Is there a way to regularly refresh the launcher icon? Or is there another clever solution to monitor Slack and have an indication as to whether or not I have unread messages? I'm getting the Desktop notifications that let me know I have a new @mention or PM, but if I walk away for a second, I may not notice that I have unread messages.