Suggestion: Thread indicators

[electricduck]

One nice thing about Phanpy.social is indicators that show a post is threaded (regardless of whether "1/" is in the post). It'd be cool to see Ouranos do this too

[github-actions[bot]]

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[pdelfan]

Thanks @electricduck, this looks useful. I plan to make some big changes to the timeline so threaded posts are grouped nicely, so I'll experiment with thread indicators when I start working on that