Regression:[most likely SHLWAPI] ShellExecCmdLine(), RunDlg does not accept "fonts" anymore

Reproduction steps

• open the Run-Dialog and from there run "fonts" (without the quotes)

Expected result
it should open a file browser window within C:\ReactOS\fonts
2k3sp2 does succeed
XPSP3 does succeed
ReactOS 0.4.14-release-93-g10d0e9b does succeed

Observed result
0.4.15-dev-6676-gf2a0122 opens a msgbox "The system cannot find the file specified."
0.4.15-dev-6676-gf2a0122_fonts_failed_affected.webm
0.4.15-dev-6676-gf2a0122_fonts_failed_affected.log

fixme:(dll/win32/shlwapi/url.c:1977) (L"fonts" 4): stub

err:(win32ss/user/user32/windows/messagebox.c:1048) MessageBox: L"The system cannot find the file specified.\r\n"

Regression test
reactos-bootcd-0.4.15-dev-5677-gf691efe-x86-gcc-lin-dbg__affected_guilty.webm
reactos-bootcd-0.4.15-dev-5676-g5c22ce3-x86-gcc-lin-dbg__OK.webm

Notes

• It is worth to know that the "fonts" folder has some specialities, it is no regular folder like "system32" which still can be invoked from the RunDlg even in the affected builds
• It does not matter whether fontext.dll is registered or not in the affected builds. In both cases it will fail.
• The ticket blocks the backport for CORE-17612