[FIX] web_editor: fix color classes for non-background properties
[FIX] web_editor: fix color classes for non-background properties

The computed preview for non-background properties (e.g. borders) was
wrong in the left panel since the color presets classes were considered
by mistake.

Part of https://github.com/odoo/odoo/pull/52605

closes odoo/odoo#52605

Signed-off-by: Quentin Smetz (qsm) <75b324bb495ac8d4f83496f7c52eda774af7ed7a@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo