Before this commit: - When a banner was inserted at the first line and Ctrl+A and backspace is performed, nothing happens. After this commit: - Now, all the content except banner will be selected and removed. task-3432167 closes odoo/odoo#151735 X-original-commit: 530f102720458e5e1c224bf38073cd763309bf0a Signed-off-by: Antoine Guenet (age) <age@odoo.com>