Once in a while we make a post which is not directly connected to Google Plus. It usually happens when we spot some interesting news connected to Google products. This is one of those times.
There is a new feature in Gmail. Now, when you get an email with a shared folder invitation from Dropbox, you'll see an option to "View folder" directly from your inbox - on the same row that the specific incoming email is. This might be true for other file sharing services, so if you know about another service be sure to leave a comment below.
Basically, when you click on the View folder button, you are automatically referred to that folder on Dropbox. Cool new feature, and a nice time saver!