Thank you very much, this helped a lot!
I'm still stuck with my LoDs, but the Dasboard looks a lot better now!
No worries, I am glad to help.
If my reply answers your question, can you mark my answer as correct to close the thread?
I was still hoping to find a solution that actually unites the texts for all connected nodes and leaves instead of hiding all but one. This would solve my performance issues. But I'm starting to believe there might not be a proper solution in Talbeau.
I'd like to leave the thread open for a few days before I mark it as answered.