Tabs: ensure to have folder icons for remote folders
KIO::iconForUrl relies on filename to find the icon for remote files. Appending / at the end of the filename allows it to interpret it as a folder.
This causes inconsistent tab icons.
Open in a tab a url on a smb or sftp folder, i.e sftp:/my-server/photos
Before: Icon is a cloud.
After: Icon is a folder
Previously a folder icon could be presented if the tab was first opened with a url with a trailing /