Outputs become disordered after adjusting them

[Denneisk]

When adjusting outputs, for example on a Wire Constant Value, the output order will become mixed. This appears to have started after #2891 and is directly related to the local table ents_with_outputs and functions that modify it.

This isn't very high priority in my opinion, I'd rather have this fixed in a refactor of wireshared/wirelib, but anyone who wants to go at it can do so.