How to get rid of PGAdmin 'Notifications' panel

I pushed some key combination by mistake that made this panel pop up:

Now I can't find how to make it disappear. The solution is not evident at all, and it is really bothering because it covers a big part of the results panel. I already tried closing the application and nothing, it is still there when I open it again.

EDIT

Now things are getting worst. Now I dettached the results panel trying to change its size:

Can't find how to attach it again.

Specifically click the word Notifications and drag the dialog around to snap it where you'd like. Snap will not work if you just click the title bar and drag the dialog around.

StackExchange Database Administrators Q#290138, answer score: 2