Prior to this commit, the color presets generated by the color palette would always be visible by the user which could lead to confusion. Most users would click on the presets and edit them instead of editing the color palette. This commit groups the presets into a collapsed section under the color palette to incentivize the user to click on the color bubbles instead. task-2687469 closes odoo/odoo#79921 Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>