This commit fixes `.o_view_nocontent`'s mobile layout. Prior this commit, it's content was overflowing on top of the page. task-3418657 part of task-3015891 closes odoo/odoo#129115 X-original-commit: a51310a53ac3abf7435223e2d2a3215a3e60df50 Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com> Signed-off-by: Vallaeys Valentin (vava) <vava@odoo.com>