threadbuilder: show siblings even when no parent found

Show all threading associations even when not all nodes are present.
Indicate if a thread is incomplete, i.e. misses a direct parent node.

Use the `msglist_thread_orphan.fg=red` styleobject in your stylesheet to
indicate whether a messsage has a missing parent.

Also use a different thread prefix ("┬─" instead of "├─") not to confuse
them with regular threads that have a visible parent.

Signed-off-by: Koni Marti <koni.marti@gmail.com>
Signed-off-by: Robin Jarry <robin@jarry.cc>
Tested-by: Matěj Cepl <mcepl@cepl.eu>

0 files changed, 0 insertions, 0 deletions