pgadmin4 restore command keep running

Hi, everyone! I am a database novice and I just started to teach myself postgresql, following the instructions from posgresqltutorial.

When I restored a sample database with pgAdmin4 following these steps, a small widget showed up at the bottom-right of the GUI:

Since it says the command is "running", I assumed that the command had not finished its job yet, so I waited for some time. But later I lost my patience and tried to query some data from the tables, and it returned what I expected.

So why is it that the widget just won't go away, even after I restarted pdAdmin? Is there anything wrong with my case or is it just a normal behavior? How can I get rid of it?