just at the moment I orphaned abakus.
Abakus  is still based on qt4. There's an already long open bug  about open work in coordination with upstream to port it to Qt5. I remember found some patches somewhere (lost link) tor a qt5 port, but do not find them any more. Further, upstream should be checked if still alive and poked about a new release with the qt5 feature. unfortunately I don't find currently enough free time to do that work, could maybe someone else pick it up and talk to upstream?