Wait until contacts have been cleared when disconnecting

Also, use an mpsc for UpdateContacts messages, not a watch, since
the messages now represent changes instead of snapshots.

Co-authored-by: Nathan Sobo <nathan@zed.dev>
b8aba0972dMax Brunsfeld committed on 5/10/2022, 12:23:39 AMparent2a2698b
3 files changedLine totals unavailable