UI scaling on high resolution

[Loki79]

Hi,
i got some similar graphic problem, but wasnt able to solve it via ui scale settings. I tried to disable ui scale and i changed ui scale to several values (only with the ingame menu)

It looks like this:

- see attachment -

I dont want the space between background and border. The close 'x' also looks weird. So what can I do?
Thx 4 ure help

Loki


- EDIT -
This was for the Aurora addon page, but i missed a tab, so sorry for the doublepost...