Filter out link-hint false positives.

We recognise elements with a class names containing the text "button" as
clickable.  However, often they're not, they're just wrapping a
clickable thing, like a real button.

Here, we filter out such false positives.

This has two effects:

- It eliminates quite a number of real false pasitives in practice.
- With fewer hints close together, fewer hint markers are obscured by
  the hints from (non-clickable) wrappers.  This reduces the need for
  rotating the hint stacking order, e.g #1252.

0 files changed, 0 insertions, 0 deletions