[FIX] web: fix issue of notebook page with invisiblity modifier

before this commit: when there is only one page in the notebook tag and
there is a boolean field in form to show/hide that notebook page based on
invisibility attrs, if we toggle boolean field notebook hides, that's OK
but when we toggle boolean field again then notebook page is displayed but
it is not active and due to that content of notebook page is not displayed.

after this commit: when there is only one page in notebook and it has attrs
for invisibilty, when we toggle boolean field to hide/show notebook page
then notebook page as well as content is toggled.

task-2449053

closes odoo/odoo#66582

X-original-commit: a0b5ecd3
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>