## Fixes:
4351: "Infinite load won't work if the same sort option clicked"
Test case:
1. Click Following
2. Click New
3. Scroll down to load at least 1 extra page.
4. Go up and click New again.
## The Issue:
`scrollBottomCbMap[page]` in this case did not reset since the `id` remained the same.
## The Fix:
I don't know how else to notify the effect to run. Perhaps "when `page=1`" is one criteria, but I found that removing `scrollBottomCbMap` can also fix it.
I don't know what scenario that `scrollBottomCbMap` was originally meant to handle, so will need to depend of reviewer to confirm I did not break something else. This fix assumes that recent inf-scroll fixes and debouncing would have addressed the "weird stuff happening with fast scrolling" problem mentioned in the comments.
The previous code was simply delaying the handler, which served the intention of the time, which is to avoid using the wrong coordinate from querying too early. However, we ended up servicing each scroll message.
This is the proper fix, and should technically make scrolling smoother. Maybe this will fix 3576 as well, although I don't see much difference.
If you are at the bottom and you hit the UP_ARROW key one time, the logic still thinks we are at the bottom, despite the component has clearly moved. Similar to the issue noted in the previous commit, this causes the page to increment incorrectly.
My wild guess is that the previous logic depends on the css height, so it might got broken due to css changes. Hopefully the new calculation is more robust and works for all cases.
---The bad scenario:
If you're at the bottom and you go up using UP_ARROW or HOME key, the coordinate is still at the bottom if we service the callback immediately. This causes 'contentWrapperAtBottomOfPage' to be true and we ended up incrementing the page unnecessarily (even for searches that no longer yield any extra results).
---Fix:
Fix by adding a delay. The value can probably be fine-tuned further.
* am I done?
* post diff
* unused selector cleanup
* missed commit
* mess with button styles
* fix flow
Co-authored-by: Jeremy Kauffman <jeremy@lbry.io>
Co-authored-by: Sean Yesmunt <sean@lbry.io>
