More customizability for server folders

By more customizability I mean that Discord server folders should have the ability to put a custom icon to represent them; as of now there's just the basic folder design and the ability to change the color of the background of the folder.

• The ability to put your personal icon to a folder can work because:
  Servers in folders are often related, and having an icon to assimilate them can be useful to recognise them without hovering on the folder,
• Seeing either the small icons of the server or the folder symbol is not the best, as it makes it less visible to recognise every server in it, plus if you have more than 4 servers in it you can't view the next ones, which would kind of remove the point of having the server icons to display the folder