Pcbnew Board Statistics shows incorrect board size

Description

Inspect -> Show Board Statistics.

Board Size values are incorrect. It seems that the board size calculations are taken from the outside of edge cuts features, not the center - as specified in the docs. If I change the line thickness on edge cuts layer then the board size changes..

Dimension shown = actual dimension + 2*line thickness*0.5

In both these images the board should be 80mm by 50mm

Steps to reproduce

1. Create new board in PCB Editor.
2. Create board outline on edge cuts layer (rectangle or separate lines)
3. Inspect -> Show Board Statistics

KiCad Version

Application: KiCad arm64 on arm64

Version: 8.0.4, release build

Libraries: wxWidgets 3.2.5 FreeType 2.13.2 HarfBuzz 8.3.0 FontConfig 2.15.0 libcurl/8.4.0 (SecureTransport) LibreSSL/3.3.6 zlib/1.2.12 nghttp2/1.58.0

Platform: macOS Sonoma Version 14.4.1 (Build 23E224), 64 bit, Little endian, wxMac OpenGL: Apple, Apple M1 Ultra, 2.1 Metal - 88

Build Info: Date: Jul 17 2024 00:34:47 wxWidgets: 3.2.5 (wchar_t,wx containers) Boost: 1.84.0 OCC: 7.7.2 Curl: 7.87.0 ngspice: 42 Compiler: Clang 14.0.3 with C++ ABI 1002

Build settings: