QtCreator may not use os-style for widgets when using a custom display scaling, tipical on high dpi displays.

In my case, i'm using windows 10 on a 13" laptop with 1920x1080 resolution and a custom desktop scaling of 150%.

To reproduce:
1) apply a custom desktop scaling from windows display settings form
2) open QtCreator
3) open tools> options. The style may not be the default os style

Expected:
Use the os style for every widget at every display scale percentage