Before this commit, the 'selection' fields were treated like 'char' fields in the "Add Custom Filter" menu of the control panel's filter menu. This meant that their value was defaulted to "". Now, the default value of a selection field is its first selection value. closes odoo/odoo#49772 X-original-commit: 62b62570725bc8eb3d3fa77fd1e8efd7a4fb5d2b Signed-off-by: Aaron Bohy (aab) <aab@odoo.com> Signed-off-by: Julien Mougenot (jum) <jum@odoo.com>