Before this commit, the active category was wrongly computed,
which results is wrong display of the active category while
scrolling and while clicking on the category bar.
The bug was that computation relied on condition of 1st rendered row,
instead of 1st visible row. Rendered rows include the extra before
the 1st visible one, here 10 extra rows above.
As a result, the computation of active category acts as if the
viewport was offset by 10 rows upward.
Task-3017324
closesodoo/odoo#103124
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>
Alexandre Kühn
9cbbf036f6