Minimize on close behavior made optional.
See the Changelog for list of features and fixes currently only available in the nightly builds.
Hey leijsten, are you sure? It seems to work over here. When a user is added to the list a User Groups dialog should open as long as Options->UI->Open groups dialog... is checked.
Thanks for your answer Nir, but I tried again (the option was checked). It still doesn't open the User Groups Dialog.
I discovered now that it works when I add a user via the 'Transfers>Uploads' tab. It doesn't work when I add a user via the 'Users>User list' tab and then select 'Add user' in the actionbar. Maybe it's not supposed to work there, because the 'Configure User Groups' button can be seen.