Editor theme switches to Godot 2 theme after switching to custom (4.5 dev5)

[wyu100]

Tested versions

tested in Godot 4.5 dev 5

System information

Windows 10 Godot 4.5 dev5

Issue description

When you change the text editor theme (In my case I turned off the yellow highlight for warnings) and then reload the project it will load the godot2 theme instead of the custom theme for any of the values you haven't modified.

Steps to reproduce

1. Open any project
2. Go to editor settings > text editor > theme
3. switch the mode to custom
4. reload the editor

Minimal reproduction project (MRP)

It's an editor setting so any project will do.

[AThousandShips]

Thank you for reporting, this is already tracked in:

• Modifying colors of the text editor theme highlightings causes non-modified colors to change without user input upon project reload. #103914

Closing to keep things in one place, please add any additional details there