Description of the Issue

Black strip is visiable near number line in text editor.

Steps to Reproduce the Issue

1. Open text editor and select "Settings -> Preferences -> Dark Mode -> Dark mode"
2. Without closing above dialogue select "Light mode"
3. See there is black strip visible near left side, previously it was not there.

Expected Behavior

Black vertical line should not appear after selecting Light mode.

Actual Behavior

Black vertical line appears after selecting Light mode.

Debug Information

Notepad++ v8.5.2 (64-bit)
Build time : Apr 4 2023 - 19:55:32
Path : C:\Program Files\Notepad++\notepad++.exe
Command Line :
Admin mode : OFF
Local Conf mode : OFF
Cloud Config : OFF
OS Name : Windows 10 Enterprise (64-bit)
OS Version : 22H2
OS Build : 19045.2846
Current ANSI codepage : 1252
Plugins :
DSpellCheck (1.4.24)
JSMinNPP (1.2205)
JsonTools (3.2)
mimeTools (2.9)
NppConverter (4.5)
NppExport (0.4)
NPPJSONViewer (1.41)
NppXmlTreeviewPlugin (2)
XMLTools (3.1.1.13)

It may be scintilla dependant but needs to confirm.