Unexpected indentation for items in combobox

[SHF101202021]

Describe Your Environment

Language

Python

Description / Steps to Reproduce [if necessary]

The items in the combobox get extra indentation if using QDarkStyle.

I try to use method provided by asch99 in #200 to add QComboBox::item:checked in the style sheet loaded by the QApplication, but it does not work.

QComboBox::item:checked {
  font-weight: bold;
  height: 12px;
}

Could anyone give me some insight to solve this?
Thanks in advanced.