3D Viewer- can't zoom in as far on small boards vs large boards

Description

In the 3D viewer for the PCB editor, the maximum allowed zoom level seems to depend on the size/bounding box of the PCB file. I think this is suboptimal- you should be able to see the same amount of detail regardless of the total size. I'm pretty sure this is a regression, but I can't remember for certain and don't have an old install to check.

max zoom on a ~20x20 breakout board PCB max zoom on a ~350x150 keyboard PCB

Steps to reproduce

1. zooooooom

KiCad Version

Application: KiCad (64-bit)

Version: (5.99.0-12792-g7e8f2cdb94), release build

Libraries:
	wxWidgets 3.1.5
	libcurl/7.78.0-DEV Schannel zlib/1.2.11

Platform: Windows 10 (build 19041), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: Oct 14 2021 00:00:14
	wxWidgets: 3.1.5 (wchar_t,wx containers)
	Boost: 1.76.0
	OCC: 7.5.0
	Curl: 7.78.0-DEV
	ngspice: 35
	Compiler: Visual C++ 1929 without C++ ABI

Build settings:
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON

@mwielgus said on discord that he wanted to take a look