Missing update information in gui client

I just updated the gui client (apt-get update && apt-get upgrade on Ubuntu 16.04) while the gui client was running. After the update there is no information about a new version of the client just being installed, so users do not know if they have to restart the client (if necessary). I assume that a restart of the gui client is needed after an update, but I actually do not know if there is some magical self-updating going on, as there is no way to check the current verison in the gui client (see my other issue from a few seconds ago).

Ideally the gui client should understand that an update happened and signal that to the use so she can restart the gui client.

If a restart of the client is not needed, it would be cool if the gui client somehow told the user just that to avoid confusion about this issue, e.g. "An update of the client software happened, but you do not need to restart the client as we took care for this already behind the scenes."

Thanks for your attention!

No files, tests, or entry points are mentioned. Start by locating the GUI client's update and version-display handling, then determine whether package updates require a restart; done means the client clearly tells users whether an update occurred and whether restarting is necessary.