This commit allows to regenerate the connectors of the step block when one of the columns of the block is duplicated or deleted. Steps to reproduce the fixed bug: - Drop a steps block - Duplicate one of the columns => The last column of the first row has a connector to the right of the page. closes odoo/odoo#102797 X-original-commit: 56522f4a26c95878bb726f54eb02c8c948576875 Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>