ShellPkg: Fix using root of drive

This allows near complete use of drive roots “fs0:” and “fs0:\” as directories and arguments to commands.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jaben Carsey <Jaben.carsey@intel.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>
Reviewed-by: Tapan Shah <tapandshah@hp.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15463 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Application/Shell/ShellProtocol.c

@@ -1914,6 +1914,8 @@ CreateAndPopulateShellFileInfo(
     }
   }
 
+  TempString = PathCleanUpDirectories(TempString);
+
   ShellFileListItem->FullName = TempString;
   ShellFileListItem->Status   = Status;
   ShellFileListItem->Handle   = Handle;
@@ -2143,7 +2145,7 @@ ShellSearchHandle(
       //
       FileInfo = FileHandleGetInfo(FileHandle);
       NewShellNode = CreateAndPopulateShellFileInfo(
-        L":",
+        MapName,
         EFI_SUCCESS,
         L"\\",
         FileHandle,