Compilation messages spill into net label syntax help

Description

Using the latest official build for Microsoft Windows 64 bits, some compilation messages seem to have spilled into the schematic editor’s net label syntax help text. See attached screenshot:

Steps to reproduce

1. Open a schematic
2. Edit a net label
3. Open the syntax help
4. Scroll down

KiCad Version

Application: Editeur de Schématique KiCad (64-bit)

Version: (6.0.1), release build

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

Platform: Windows 10 (build 22000), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: Jan 15 2022 13:36:27
	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