Before this commit: When we inserted a new row or column into a table, a <p> tag was not inserted within it, resulting in the placeholder not being displayed. After this commit: When a new row or column is inserted into the table, a <p> tag is inserted within the <td>. task-3344668 closes odoo/odoo#137429 X-original-commit: a3e09ed84451f8a7c5cbc82648a02565ef63072f Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>