PacketViewer: Fix opsname not shown when connected

The opsname column in the packet viewer would not
show any content when receiving packets from a
remote server. It only worked when opening local
files. This probably due to an earlier refactorying.
yamcs v0.24.2
Prepare v0.24.3 builds
Merge pull request #33 from fqqb/eratest

Eratest