NPPM_RELOADFILE long filename issue

[chcg]

Description of the Issue

Usage of NPPM_RELOADFILE from pythonscript by test case https://github.com/bruderstein/PythonScript/blob/master/PythonScript/python_tests/tests/NotepadWrapperTestCase.py#L383-L397 with a 8.3 notation of the file path shows an issue that the file is not found by N++. Introduced from the very beginning with:

Revision: 5529852
Author: harrybharry harrybharry@f5eea248-9336-0410-98b8-ebc06183d4e3
Date: 16.06.2008 13:35:05
Message:
Fix file case problem.
Fix incremental search not using selected text.
Fix Session not loaded using anything other than file->open menu.

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository@235 f5eea248-9336-0410-98b8-ebc06183d4e3

Modified: PowerEditor/src/Notepad_plus.cpp
Modified: PowerEditor/src/ScitillaComponent/Buffer.cpp
Modified: PowerEditor/src/lastRecentFileList.cpp

Steps to Reproduce the Issue

1. Call NPPM_RELOADFILE with a filename containing 8.3 notation, e.g. C:\longnamedir aka C:\longna~1

Expected Behavior

• File reloaded

Actual Behavior

• File not reloaded

Debug Information

Notepad++ v8.2.1 (64-bit)
Build time : Jan 30 2022 - 00:24:07
Path : C:\Users\christian\Source\Repos\npp.8.2.portable.x64\notepad++.exe
Command Line :
Admin mode : OFF
Local Conf mode : ON
Cloud Config : OFF
OS Name : Windows 10 Home (64-bit)
OS Version : 2009
OS Build : 19044.1503
Current ANSI codepage : 1252
Plugins : HexEditor.dll Papyrus.dll PythonScript.dll

[donho]

PR #11107 causes the regression #11215.
So this issue is reopened.