Before this commit, the wrong semantics was implemented in the webclient
concerning the "sort" char field in ir.filter
Loading a filter with a sort with negative order made the webclient crash
This field holds a JSON string, representing a list of field names
If the order of the field is inverse, there should be a "-" before it
for legacy purposes
After this commit, the semantics have changed for consistency
that is, at save time the sql notation is preferred
We support the legacy notation too for backward compatibility
closesodoo/odoo#31102
Lucas Perais (lpe)
6d5a993cf7