FIX: Topic queryParams are removed from history state when scrolling. (PR #14881)

  • Also fixed a bug where the queryParams are not removed when toggling between filters.


No tests here because I have no idea how to test stuff which involves scrolling.

Prior to this fix, we would drop the query params such as username_filters, filters and replies_to_post_number.

Before this fix, the properties were not updated because this.get("model.postStream.streamFilters") was returning {}

Would not know how to test this either…if you are sure it’s OK then :+1:

Thank you for the review @martin-brennan