Comment 32 for bug 1727908

Just tested on focal. I didn't have the repo, so I added it:
```
deb http://archive.canonical.com/ubuntu focal partner
```
It correctly asked me the password and after that it was added. I deselected it to verify this bug.
Then I closed the software-properties-gtk window.

To then verify the bug, I opened again software-properties-gtk (from Dash), moved to Other Software and clicked on the Canonical Partners repo. On click nothing appeared (we would be expecting a password prompt) but the window got unselected, like if I had moved to some other window.