When one constucts a custom filter in the search view and clicks
on the "ADD A CONDITION" button, the new condition dropdowns always
start with the top of the lists.
This commit will instead default a new condition to the same field and
operator as the previous one.
Presetting the dropdowns used in the previous condition is a better
guess for what a user tries to filter than starting the dropdowns each
time at the top of their lists.
closesodoo/odoo#56918
Taskid: 2222545
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>