Awesome! Many thanks
Yep, completely forgot to append one in my first post. It shows the project manager as it starts with the default resolution 1280 x 800 (Retina) -> scaled by 2. By setting the display resolution to its native size of 2560 x 1600 it looks better (screenshot 3). After having it started this way and the changing the resolution back to 1280 x 800 the window is a little bigger but still good (screenshot 4).
I've also noticed that the "x"-Icon of the close-button in the upper right of the window is missing (screenshot 2).