KiCad on OSX Monterey not using HiDPI/Retina

Description

The latest KiCad 5.99 nightlies seem to run OK on the latest OSX 12 "Monterey" beta, but they are blurry and not using the HiDPI/Retina resolution.

This is an easy fix. The problem is in the Info.plist for the app. The key "NSHighResolutionCapable" is currently specified as a type "string" with value "True". However, according to Apples documentation, that key is supposed to be a "boolean" type. Thus, it should look like:

<key>NSHighResolutionCapable</key><true/>

If I make that change, it starts up using the full resolution.

Steps to reproduce

Start KiCad, note how blurry

KiCad Version

Application: KiCad

Version: (5.99.0-10950-gfad5f9881a), release build

Libraries:
	wxWidgets 3.1.5
	libcurl/7.76.0 SecureTransport (LibreSSL/2.8.3) zlib/1.2.11 nghttp2/1.42.0

Platform: macOS Version 10.16 (Build 21A5248p), 64 bit, Little endian, wxMac

Build Info:
	Date: Jun  8 2021 23:56:59
	wxWidgets: 3.1.5 (wchar_t,STL containers)
	Boost: 1.76.0
	OCC: 7.5.1
	Curl: 7.54.0
	ngspice: 31
	Compiler: Clang 10.0.1 with C++ ABI 1002

Build settings:
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON