Save Changes window on PCB Editor when close but no changes are made

[ZokiPokiMk]

Describe the bug If you open the PCB Editor dont do any change, start the plugin, close the plugin, close the Editor window popups asking to save changes even thou no changes were made. Even if you click on Save and kicad saves the file, the file content is not changed.

To Reproduce Steps to reproduce the behavior:

1. Open KiCad
2. Open project
3. Click on PCB Editor
4. Click on JLCPCB Tools image button.
5. Click on X to close the JLCPCB Tools form.
6. Click on X to close the PCB Editor

Expected behavior No Save Changes? popup should occur when no changes are made.

KiCad Version

Application: KiCad PCB Editor 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

[Bouni]

I can only guess but because we access the kicad_pcb file with the plugin, KiCAD assumes we changed it and asks you if you want to save the changes.

I made a copy of a kicad_pcb file, opened the original file with KiCAD, opened the plugin and saved when it asked me.

If I diff these two files there a no changes at all.

So I guess this is just an inconvenience but nothing to be concerned about.