Allow to display any place in favorites, /home/user or trash:/ or sftp:/my-server

cc @ngraham I noticed you had remote and trash:/ in your favorites but kicker would not let you list them.

This fixes it. The drawback is using KIO::stat here with remote mounts (/mount/my-nfs-server) and unresponsive network will freeze plasma. This is not the only occurrence of places where such freeze can happen if I remember correctly.

BUG: 424949