When setting the font, the order can be reversed. Handle that situation

[tbttfox]

Checklist

• [ x] I have read the CONTRIBUTING.md document
• [ x] I formatted my changes with black
• [ x] I linted my changes with flake8
• [ x] I have added documentation regarding my changes where necessary
• [ x] Any pre-existing tests continue to pass
• Additional tests were made covering my changes

Types of Changes

• [ x] Bugfix (change that fixes an issue)
• New Feature (change that adds functionality)
• Documentation Update (if none of the other choices apply)

Proposed Changes

When using preditor with PySide6, QFontDialog.getFont() returns the boolean value first, so rather than trying to be tricky, I just check if the first is a boolean, and unpack accordingly.

[MHendricks]

Annoyingly PySide6 doesn't match any of the other bindings.

$ pyside6/Scripts/python -c "from PySide6.QtWidgets import QFontDialog;help(QFontDialog.getFont)"
Help on built-in function getFont:

getFont(...)
    getFont(initial: Union[PySide6.QtGui.QFont, str, Sequence[str]], parent: Optional[PySide6.QtWidgets.QWidget] = None, title: str = '', options: PySide6.QtWidgets.QFontDialog.FontDialogOption = Default(QFontDialog.FontDialogOptions)) -> Tuple[bool, PySide6.QtGui.QFont]
    getFont(parent: Optional[PySide6.QtWidgets.QWidget] = None) -> Tuple[bool, PySide6.QtGui.QFont]


$ pyqt6/Scripts/python -c "from PyQt6.QtWidgets import QFontDialog;help(QFontDialog.getFont)"
Help on built-in function getFont:

getFont(...) class method of PyQt6.QtWidgets.QFontDialog
    getFont(initial: QFont, parent: Optional[QWidget] = None, caption: Optional[str] = '', options: QFontDialog.FontDialogOption = QFontDialog.FontDialogOptions()) -> (QFont, Optional[bool])
    getFont(parent: Optional[QWidget] = None) -> (QFont, Optional[bool])


$ pyside2/Scripts/python -c "from PySide2.QtWidgets import QFontDialog;help(QFontDialog.getFont)"
Help on built-in function getFont:

getFont(...)
    getFont(initial: PySide2.QtGui.QFont, parent: typing.Optional[PySide2.QtWidgets.QWidget] = None, title: str = '', options: PySide2.QtWidgets.QFontDialog.FontDialogOptions = Default(QFontDialog.FontDialogOptions)) -> typing.Tuple[PySide2.QtGui.QFont, bool]
    getFont(parent: typing.Optional[PySide2.QtWidgets.QWidget] = None) -> typing.Tuple[PySide2.QtGui.QFont, bool]


$ pyqt5/Scripts/python -c "from PyQt5.QtWidgets import QFontDialog;help(QFontDialog.getFont)"
Help on built-in function getFont:

getFont(...)
    getFont(initial: QFont, parent: Optional[QWidget] = None, caption: Optional[str] = '', options: Union[QFontDialog.FontDialogOptions, QFontDialog.FontDialogOption] = QFontDialog.FontDialogOptions()) -> (QFont, Optional[bool])
    getFont(parent: Optional[QWidget] = None) -> (QFont, Optional[bool])

Formatted to be a little easier to compare.

PyQt5:   getFont(initial: QFont,                            parent: Optional[QWidget] = None, caption: Optional[str] = '', options: Union[QFontDialog.FontDialogOptions, QFontDialog.FontDialogOption] = QFontDialog.FontDialogOptions())        -> Tuple[QFont, Optional[bool]]
PyQt6:   getFont(initial: QFont,                            parent: Optional[QWidget] = None, caption: Optional[str] = '',                                       options: QFontDialog.FontDialogOption = QFontDialog.FontDialogOptions())        -> Tuple[QFont, Optional[bool]]
PySide2: getFont(initial: QFont,                            parent: Optional[QWidget] = None,             title: str = '',                                      options: QFontDialog.FontDialogOptions = Default(QFontDialog.FontDialogOptions)) -> Tuple[QFont, bool]
PySide6: getFont(initial: Union[QFont, str, Sequence[str]], parent: Optional[QWidget] = None,             title: str = '',                                       options: QFontDialog.FontDialogOption = Default(QFontDialog.FontDialogOptions)) -> Tuple[bool, QFont]

PyQt5:   getFont(parent: Optional[QWidget] = None) -> Tuple[QFont, Optional[bool]]
PyQt6:   getFont(parent: Optional[QWidget] = None) -> Tuple[QFont, Optional[bool]]
PySide2: getFont(parent: Optional[QWidget] = None) -> Tuple[QFont, bool]
PySide6: getFont(parent: Optional[QWidget] = None) -> Tuple[bool, QFont]