This commit adds a test that highlights mismatches in grid-related
options (classes, grid-area style...).
It also fixes the remaining issues in themes about it.
task-4213996
closesodoo/design-themes#971
X-original-commit: cf227cd139
Related: odoo/odoo#182039
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>