[0.18.22] Infinite waiting for save when connecting during saving

[pavlukivan]

What happens is:
1. Autosave starts on server
2. The user tries connecting, message "Saving the map for X" appears on server (along with the "Saving autosave" message)
3. Autosave ends, the "Saving the map for X" message gets changed to "Saving the map", then it saves
4. Meanwhile, the connecting user only has the message "Waiting for save" and "X is downloading the map" doesn't appear on server

The messages aren't exact, it's just their meaning. I can provide a save where that happens, but it's modded. I will send it if you can't reproduce it normally.