## Issue
5090: When sorting channels, switching between Trending/Top/New returns viewer to the top of the page
## Approach
- Add an optional parameter to `ClaimListDiscover/Header` to add an additional anchor ID when building a new search URL.
- Clients then add the anchor ID on the desired location.
- The code that handles the scrolling then checks if the `location` contains an anchor hash. If it does, we'll scroll to that element; else, the existing behavior will be used.
I believe we don't translate these since this is already the translated form?
When the language is supported later, the English version will be added to the string database instead.
## Issue
4393: Tag query URL goes on indefinitely as you change between [Trending|New|Top]
## Change
Change from `append` to `set` when building the query to remove duplicates.
Flow hates null being not a string, so the FixMe was retained.
