Crash when importing schematic settings from other project

Description

Kicad 7.0.7 waits some time and then closes abruptly when trying to import schematic settings from another project.

Steps to reproduce

1. Create a new project, click schematic editor
2. Click "Edit schematic setup" icon
3. Click "Import settings from another project" button
4. Click all checkboxes
5. Select a same kicad version project
6. Click Ok

KiCad Version

Application: KiCad x64 on x64

Version: 7.0.7, 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: Aug 14 2023 02:42:39
	wxWidgets: 3.2.2 (wchar_t,wx containers)
	Boost: 1.81.0
	OCC: 7.7.1
	Curl: 7.88.1-DEV
	ngspice: 40
	Compiler: Visual C++ 1936 without C++ ABI

Build settings:
	KICAD_SPICE=ON

added 7.0 priorityundecided statusnew labels

added eeschema priorityhigh statusconfirmed labels and removed priorityundecided statusnew labels

Confirmed with KiCad Version: 7.0.7-1-g800b697d, release build, Win10.

It's the checkbox "import from another project-->Import-->violation severities" which causes the crash.

assigned to @charrasjp

closed with commit 7ac3e09a

added needs-cherry-pick label

removed needs-cherry-pick label

Fixed in master branch.

Looks like stable branch has another serious bug

Other bug fixed in stable branch by commit f9b59b4f

changed milestone to %7.0.8