[OutputBuilder, persistence] Contact server to remove slot from (PartsTable of) combination group when clicking associated "Remove" button.
[OutputBuilder, persistence] Contact server to remove slot
from (PartsTable of) combination group when clicking associated "Remove"
button.

Note that we don't do any real error handling yet.

itsjeyd/ODE,itsjeyd/ODE,itsjeyd/ODE,itsjeyd/ODE