* fix: only show pipe layer popups to the user changing them
* fix: don't show pipe layer subfloor popup when not using a screwdriver
* fix: properly pass down user and used for serverside pipe layer changes
Technically this doesn't matter as the Shared codepath for this method
doesn't actually use these on the server: only the user is used for a
clientside popup. Still, will be good to have these for future changes
that might need them.
