Simulator - Plot axis labels are too small on high DPI displays

Description

The text in the simulation plot window is way too small on reasonably high DPI displays and there appears to be no way for the user to change it. The following image is from a display running at 3840 x 2160.

Steps to reproduce

KiCad Version

Application: KiCad x64 on x64

Version: 7.0.5, release build

Libraries:
	wxWidgets 3.2.2
	FreeType 2.12.1
	HarfBuzz 6.0.0
	FontConfig 2.14.1
	libcurl/7.88.1-DEV Schannel zlib/1.2.13

Platform: Windows 10 (build 19045), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: May 27 2023 02:48:13
	wxWidgets: 3.2.2 (wchar_t,wx containers)
	Boost: 1.81.0
	OCC: 7.6.3
	Curl: 7.88.1-DEV
	ngspice: 40
	Compiler: Visual C++ 1936 without C++ ABI

Build settings:
	KICAD_SPICE=ON