eeschema: print-dialog checkboxes behaviour inconsistant

Description

The Kicad Print-dialog offers 4 checkboxes. Normally the checkbox "Black&White" (if checked) disables the next checkbox "Print background color".

Directly after the start of kicad this disabling doesn't works and it's possible to set both checkboxes

• Black&White
• Print background color

at the same time. After clicking/changing the Black&White-setting the disabling works until closing eeschema.

Affects v6.0.2 and v6.99

Steps to reproduce

1. open attached project.
2. open schematic, -->File-->Print-->Print dialog --> set checkbox "Black&White" (see picture 1)
3. Close Print-dialog ; Close completely eeschema
4. reopen schematic again
5. reopen -->File-->Print-->Print dialog --> note: checkbox "Black&White" is already set from last print-dialog-usage (step 2)
6. click on checkbox "Print background color" --> now both checkboxes are set. (see picture 2).
7. This is normally not possible: see picture 3

print_printdialog_checkbox.zip

KiCad Version

Application: KiCad (64-bit)

Version: (6.99.0-1211-g6196f2bdf0), release build

Libraries:
	wxWidgets 3.1.5
	FreeType 2.11.1
	HarfBuzz 2.8.2
	FontConfig 2.13.1

Platform: Windows 10 (build 19042), 64-bit edition, 64 bit, Little endian, wxMSW

	wxWidgets: 3.1.5 (wchar_t,wx containers)
	Boost: 1.76.0
	OCC: 7.6.0
	Curl: 7.78.0-DEV
	ngspice: 36
	Compiler: Visual C++ 1928 without C++ ABI

Build settings:
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON