Description of the Issue

If in the Preferences of Notepad++ you select None for Folder Margin Style then in the Find result window (when you do a Find All in Current Document) the left margin contains uppercase characters.

Steps to Reproduce the Issue

1. Open any text file or source file with Notepad++
2. Go to Settings -> Preferences -> Editing
3. Select None for the Folder Margin Style.
4. Open the Find dialog.
5. Do a Find All in Current Document with some characters that can be found in the opened file

Expected Behavior

The left margin of the Find result window should NOT contain some strange uppercase letters.
It should contain a default margin style even if Folder Margin Style is disabled in the Preferences.

Actual Behavior

After executing a (or multiple) "Find All in Current Document" the Find result window left margin contains uppercase characters instead of a default margin style.

Debug Information

Notepad++ v7.8.1 (64-bit)
Build time : Oct 19 2019 - 14:31:15
Path : C:\Program Files\Notepad++\notepad++.exe
Admin mode : OFF
Local Conf mode : OFF
OS Name : Windows 7 Home Premium (64-bit)
OS Build : 7601.24519
Plugins : DSpellCheck.dll NppConverter.dll NppExport.dll

Check the screenshot below: