Script Editor errors are white

[KoBeWi]

Tested versions

4.3 87d40ba
Does not happen in 4.3 dev3.

System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

Issue description

Steps to reproduce

1. Create script
2. Make error

Minimal reproduction project (MRP)

N/A

[kitbdev]

Probably introduced in #88474 at CodeTextEditor::_update_text_editor_theme()
If you update the Text Editor > Theme settings it will turn red, so its just not being updated when the editor loads

[akien-mga]

CC @MajorMcDoom

[MajorMcDoom]

I will get on this shortly.