Hipchat4 for Linux doesn't integrate with system notifications

Hipchat4 introduces new notifications that no longer integrate with system notifications in KDE (I suppose that it is also the case for other desktop environments). Because of that hipchat's notification doesn't follow styling guidelines, behaviour (for example there is no history of them in KDE's notification center etc). They look like they were imported from different world.

Please add an option to use system provided notifications.