I may not have understood correctly what the option: "Preferences>User Interface>Appearance>Show window connection in application title" is supposed to do.
At least I didn't notice any change in the application title. In both cases, user@database is shown.

I may have overlooked a setting. But in v15, title 2 shows the current window. In addition, the title is centered, in contrast to v14, where it is left-aligned.
The picture shows v14 in the background.
[Linked Image]