QFontDialog doesn't accept initial font styleName and return no styleName

QFontDialog called straight ahead or called via static method QFontDialog::getFont with given initial font ignores styleName parameter of passed font.

It means that when QFontDialog appears, highlighted style differs from previously set fonts styleName.

Also, when QFontDialog closes, returned font doesn't have selected styleName.

To reproduce this problem one can do:
1. Get default system font.
2. Set some style to this font.
3. Set this font as initial for QFontDialog.
4. Verify if style set in (2) will be highlighted in QFontDialog.
5. Click Ok in QFontDialog to get font.
6. Verify if returned font contain styleName.

There is source code in attachment, so anyone can try.

On my side I got this output:

—
Default system font: QFont( "DejaVu Sans,9,-1,5,50,0,0,0,0,0" )
Available styles for system font: ("Book", "Condensed Bold Oblique", "Condensed Bold", "ExtraLight", "Condensed", "Bold", "Condensed Oblique", "Bold Oblique", "Oblique")
Chosen style: "Condensed Bold Oblique"
Bold: false
Italic: false

We expect that exactly this style will be selected in QFontDialog.

—
Chosen font: QFont( "DejaVu Sans,9,-1,5,50,0,0,0,0,0" )
Available styles for choosed font: ("Book", "Condensed Bold Oblique", "Condensed Bold", "ExtraLight", "Condensed", "Bold", "Condensed Oblique", "Bold Oblique", "Oblique")
Chosen style: ""
Bold: false
Italic: false

See a screenshot showing QFontDialog appeared with wrong style highlighted (according to output, expected Condensed Bold Oblique)