Import Sites auto-checks sites that were moved into folder for import

Steps to reproduce:

1. Start WinSCP
   
2. Click Tools > Import Sites...
   
3. Import any Site
   
4. Move Site imported on step 3 into any Site Folder
   
5. Click Tools > Import Sites...
   
6. Site that was moved into Site Folder would be auto-checked for import.
   

Expected behavior:

• Site that was moved into folder would not be auto-checked for import.
  

Version: 5.13 (same behavior on older versions) with “Commander” interface on Windows 10 FCE.

Proposal: compare Sites without Folder Names.
https://github.com/winscp/winscp/blob/5.13/source/windows/GUIConfiguration.cpp#L1345

Thanks for your suggestion.
Will see if more people ask for this.