ShellCtrls: Fix not applying FileSortType if Root <> ''. Issue #0018530.


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41149 4005530d-fff6-0310-9dd1-cebe43e6787f
ShellCtrls: Use ExpandFileNameUtf8 instead of ExpandFileName.


git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41150 4005530d-fff6-0310-9dd1-cebe43e6787f