Hidden activity/sharing panel in desktop client

Anyone know what this extra Activity/Sharing panel is in the desktop client?

Screencast of panel opening: https://adammonsen.com/tmp/screencast.webm

I found it while trying to scroll. You can’t see my mouse cursor but I was trying to scroll down the activities shown. I accidentally “pulled left” with my mouse, and that panel showed up.

I’m using version 3.10.1 running on Ubuntu desktop.

I can click on the three dots and then get this additional menu (a bit like the detail menu in the web-interface). You see the latest changes regarding to that file, and on the sharing tab, you can change the options there.

Ah yep, that’s totally it, thanks. This must be what the panel looks like before it has been populated by one of those listed items.