## Issue
- `Comment.replies` currently represent all replies, while `comment.List` returns a filtered version, so the actual replies could be less.
- The actual replies is represented by `total_filtered_items`, but we only get that after making a fetch. So, users could click "Show more" but get nothing.
## Fix
- Stop showing "Show more" based on `total_filtered_items`.
- If there is a balance, display 1 dummy comment to represent all blocked replies. This handles the case of "Show more" being displayed but ended up with 0 replies if all replies were blocked.
## Future
Note that `Comment.replies` might be changed to represented filtered comments in the near future (refer to Beamer), so the GUI is made such that the dummy just won't appear when that change happens.
Seeing the spinner too much can be annoying.
- This approach works, but currently, when the list is very long, something is taking up resources and the handler couldn't be processed, so the effect is lost (still seeing the spinner). See 6473.
- Since we are now prefetching, bumped the debounceMs a bit.
